[Andriis]

I am using the L4D2 Hunter Zombie on my server, which I found here.. But it's a little buggy .. I mean, when I choose the zm class and the next round comes I can use the L4D2's skill (Ctrl+E) while I'm a human. I tried to block it like I did with the Assassin zm, but it didn't worked, so I need a little help with it.. Thanks in advance
Here is the source file:

/*================================================================================

-----------------------------------
-*- [ZP] Hunter L4D -*-
-----------------------------------

~~~~~~~~~~~~~~~
- Description -
~~~~~~~~~~~~~~~

This zombie has long jumps as well as the popular game L4D2
Well, this time the skill is good and better,
to jump you have to press Ctrl + E and look where you want to jump.

================================================================================*/

#include <amxmodx>
#include <fakemeta>
#include <zombieplague>

/*================================================================================
[Customizations]
=================================================================================*/

// Zombie Attributes
new const zclass_name[] = "L4D2 Hunter"
new const zclass_info[] = "High Long Jumps [Ctrl+E] "
new const zclass_model[] = "hunterv2_zp"
new const zclass_clawmodel[] = "v_knife_zombie_hunter.mdl"

const zclass_health = 6000
const zclass_speed = 290

const Float:zclass_gravity = 0.6
const Float:zclass_knockback = 0.1

new const leap_sound[4][] = { "left_4_dead2/hunter_jump.wav", "left_4_dead2/hunter_jump1.wav", "left_4_dead2/hunter_jump2.wav", "left_4_dead2/hunter_jump3.wav" }

/*================================================================================
Customization ends here!
Any edits will be your responsibility
=================================================================================*/

// Variables
new g_hunter

// Arrays
new Float:g_lastleaptime[33]

// Cvar pointers
new cvar_force, cvar_cooldown

// Plugin info.
#define PLUG_VERSION "0.2"
#define PLUG_AUTHOR "DJHD!"

/*================================================================================
[Init, CFG and Precache]
=================================================================================*/

public plugin_precache()
{
	// Register the new class and store ID for reference
	g_hunter = zp_register_zombie_class(zclass_name, zclass_info, zclass_model, zclass_clawmodel, zclass_health, zclass_speed, zclass_gravity, zclass_knockback)
	
	// Sound
	static i
	for(i = 0; i < sizeof leap_sound; i++)
		precache_sound(leap_sound[i])
}

public plugin_init() 
{
	// Plugin Info
	register_plugin("[ZP] Zombie Class: Hunter L4D2 Zombie", PLUG_VERSION, PLUG_AUTHOR)
	
	// Forward
	register_forward(FM_PlayerPreThink, "fw_PlayerPreThink") 
	
	// Cvars
	cvar_force = register_cvar("zp_hunter_jump_force", "700") 
	cvar_cooldown = register_cvar("zp_hunter_jump_cooldown", "1.0")
	
	static szCvar[30]
	formatex(szCvar, charsmax(szCvar), "v%s by %s", PLUG_VERSION, PLUG_AUTHOR)
	register_cvar("zp_zclass_hunterl4d2", szCvar, FCVAR_SERVER|FCVAR_SPONLY)
}

/*================================================================================
[Zombie Plague Forwards]
=================================================================================*/

public zp_user_infected_post(id, infector)
{
	// It's the selected zombie class
	if(zp_get_user_zombie_class(id) == g_hunter)
	{
		if(zp_get_user_nemesis(id))
			return

		if(zp_get_user_assassin(id))
			return
		// Message
		client_print(id, print_chat, "thS | ^"CTRL+E^" to use ability")
	}
}

/*================================================================================
[Main Forwards]
=================================================================================*/

public fw_PlayerPreThink(id)
{
	if(!is_user_alive(id))
		return
		
	if(zp_get_user_nemesis(id))
		return
	
	if(zp_get_user_assassin(id))
		return

	if(is_user_connected(id))
	{
		if (allowed_hunterjump(id))
		{
			static Float:velocity[3]
			velocity_by_aim(id, get_pcvar_num(cvar_force), velocity)
			set_pev(id, pev_velocity, velocity)
			
			emit_sound(id, CHAN_STREAM, leap_sound[random_num(0, sizeof leap_sound -1)], 1.0, ATTN_NORM, 0, PITCH_HIGH)
			
			// Set the current super jump time
			g_lastleaptime[id] = get_gametime()
		}
	}
}

/*================================================================================
[Internal Functions]
=================================================================================*/

allowed_hunterjump(id)
{    
	if (!zp_get_user_zombie(id) && zp_get_user_nemesis(id) && zp_get_user_assassin(id))
		return false
	
	if (zp_get_user_zombie_class(id) != g_hunter)
		return false
	
	if (!((pev(id, pev_flags) & FL_ONGROUND) && (pev(id, pev_flags) & FL_DUCKING)))
		return false
	
	static buttons
	buttons = pev(id, pev_button)
	
	// Not doing a longjump (added bot support)
	if (!(buttons & IN_USE) && !is_user_bot(id))
		return false
	
	static Float:cooldown
	cooldown = get_pcvar_float(cvar_cooldown)
	
	if (get_gametime() - g_lastleaptime[id] < cooldown)
		return false
	
	return true
}