I used the code provided in the script forum.. I credited the author for the use of his code in the plugin..
The only reason I posted this is because I run a zombiemod server and players falling to their death before the first zombie spawn was causing issues. Also turning mp_falldamage 0 does not work with HL2 or CS:S so I had to get something working. Thanks for the post in the script forums as it works quite well.
Requires:
SDKhooks
Credits:
alexip121093, sourcemod scripting forums.
I added the compiled version as the compiler on the site does not support sdkhooks