Use an integer when waiting

Since the expected time is in milliseconds, it's best to use an integer instead. Floating-point numbers lose precision as they get larger, especially when the level's current time is long (e.g., over 24 hours). This loss of precision could cause scripts to wait unsuccessfully with small numbers, causing unexpected behaviors

code/fgame/scriptthread.cpp

@@ -2478,7 +2478,7 @@ void ScriptThread::Stop(void)
     }
 }
 
-void ScriptThread::Wait(float time)
+void ScriptThread::Wait(int time)
 {
     StartTiming(level.inttime + time);
     m_ScriptVM->Suspend();