Trunk build fixes

Fixed up IGameHelpers.h such that it no longer requires HL2SDK headers if a function doesn't need them

--HG--
extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%402144

core/HalfLife2.h

@@ -41,6 +41,8 @@
 #include "sm_queue.h"
 #include <IGameHelpers.h>
 #include <KeyValues.h>
+#include <server_class.h>
+#include <datamap.h>
 
 class CCommand;
 

core/smn_entities.cpp

@@ -32,7 +32,6 @@
 #include "sm_globals.h"
 #include "sourcemod.h"
 #include "sourcemm_api.h"
-#include "server_class.h"
 #include "PlayerManager.h"
 #include "HalfLife2.h"
 #include "GameConfigs.h"