- Added one to return value of SDL_GetTicks() to ensure non-zeroness.

SVN r1288 (trunk)

src/sdl/i_system.cpp

@@ -131,7 +131,7 @@ int I_GetTimePolled (bool saveMS)
 		return TicFrozen;
 	}
 
-	DWORD tm = SDL_GetTicks ();
+	DWORD tm = SDL_GetTicks() + 1;	// Make sure this isn't 0.
 	if (BaseTime == 0)
 	{
 		BaseTime = tm;