Fix alt-tabbed desync with demos

- Fixed: Stop the game timer if the window looses focus

src/d_net.cpp

@@ -939,7 +939,7 @@ void NetUpdate (void)
 	newtics = nowtime - gametime;
 	gametime = nowtime;
 
-	if (newtics <= 0)	// nothing new to update
+	if (newtics <= 0 || pauseext)	// nothing new to update or window paused
 	{
 		GetPackets ();
 		return;

src/doomstat.h

@@ -109,6 +109,7 @@ enum EMenuState
 extern	bool			automapactive;	// In AutoMap mode?
 extern	EMenuState		menuactive; 	// Menu overlayed?
 extern	int				paused; 		// Game Pause?
+extern	bool			pauseext;
 
 
 extern	bool			viewactive;

src/g_game.cpp

@@ -141,6 +141,7 @@ gameaction_t	gameaction;
 gamestate_t 	gamestate = GS_STARTUP;
 
 int 			paused;
+bool			pauseext;
 bool 			sendpause;				// send a pause event next tic 
 bool			sendsave;				// send a save event next tic 
 bool			sendturn180;			// [RH] send a 180 degree turn next tic
@@ -1152,13 +1153,13 @@ void G_Ticker ()
 			// If the user alt-tabbed away, paused gets set to -1. In this case,
 			// we do not want to read more demo commands until paused is no
 			// longer negative.
-			if (demoplayback && paused >= 0)
+			if (demoplayback)
 			{
 				G_ReadDemoTiccmd (cmd, i);
 			}
 			else
 			{
-				memcpy (cmd, newcmd, sizeof(ticcmd_t));
+				memcpy(cmd, newcmd, sizeof(ticcmd_t));
 			}
 
 			// check for turbo cheats

src/s_sound.cpp

@@ -1783,21 +1783,13 @@ void S_SetSoundPaused (int state)
 {
 	if (state)
 	{
-		if (paused <= 0)
+		if (paused == 0)
 		{
 			S_ResumeSound(true);
 			if (GSnd != NULL)
 			{
 				GSnd->SetInactive(SoundRenderer::INACTIVE_Active);
 			}
-			if (!netgame
-#ifdef _DEBUG
-				&& !demoplayback
-#endif
-				)
-			{
-				paused = 0;
-			}
 		}
 	}
 	else
@@ -1811,16 +1803,16 @@ void S_SetSoundPaused (int state)
 					SoundRenderer::INACTIVE_Complete :
 					SoundRenderer::INACTIVE_Mute);
 			}
-			if (!netgame
-#ifdef _DEBUG
-				&& !demoplayback
-#endif
-				)
-			{
-				paused = -1;
-			}
 		}
 	}
+	if (!netgame
+#ifdef _DEBUG
+		&& !demoplayback
+#endif
+		)
+	{
+		pauseext = !state;
+	}
 }
 
 //==========================================================================