engine: server: add GetNativeObject to server's PhysicsAPI

engine/physint.h

@@ -108,6 +108,9 @@ typedef struct server_physics_api_s
 	const byte	*(*pfnLoadImagePixels)( const char *filename, int *width, int *height );
 
 	const char *(*pfnGetModelName)( int modelindex );
+
+	// FWGS extension
+	void       *(*pfnGetNativeObject)( const char *object );
 } server_physics_api_t;
 
 // physic callbacks

engine/server/sv_phys.c

@@ -2122,6 +2122,7 @@ static server_physics_api_t gPhysicsAPI =
 	COM_SaveFile,
 	pfnLoadImagePixels,
 	pfnGetModelName,
+	Sys_GetNativeObject
 };
 
 /*