Don't edit the existing plugin. Keep it as it is and make your own.
PHP Code:
#include <amxmodx>
#include <cl_buy>
public client_buy(id, iItem) {
if(get_cvar_num("block_nades") == 1) {
if(iItem == CSW_FLASHBANG && !user_has_weapon(id, CSW_FLASHBANG)
|| iItem == CSW_HEGRENADE && !user_has_weapon(id, CSW_HEGRENADE)
|| iItem == CSW_SMOKEGRENADE && !user_has_weapon(id, CSW_SMOKEGRENADE)
)
return PLUGIN_HANDLED;
}
return PLUGIN_CONTINUE;
}