gmod_src: Added PhysObj:IsDragEnabled, IsGravityEnabled, IsC..

[garry]

[B]Revision 651[/B]
[INDENT]Added PhysObj:IsDragEnabled, IsGravityEnabled, IsCollisionEnabled[/INDENT][B]Changed Files:[/B]
[LIST]
[*]trunk/src_garrysmod/garrysmod/Objects/lua_physicsobject.cpp
[/LIST]
Committed By [B]Garry Newman[/B]