made pause / unpause safer and fixed issue with autopause when losing focus during the loading screen

Source/diablo.cpp

@@ -1749,29 +1749,37 @@ bool MinimizePaused = false;
 
 void diablo_focus_pause()
 {
-	if (gbIsMultiplayer) {
+	if (gbIsMultiplayer || MinimizePaused) {
 		return;
 	}
 
-	if (!MinimizePaused) {
-		GameWasAlreadyPaused = PauseMode != 0;
+	GameWasAlreadyPaused = PauseMode != 0;
 
-		if (!GameWasAlreadyPaused) {
-			PauseMode = 2;
-			sound_stop();
-			track_repeat_walk(false);
-		}
+	if (!GameWasAlreadyPaused) {
+		PauseMode = 2;
+		sound_stop();
+		track_repeat_walk(false);
+	}
 
-		music_mute();
-	} else {
-		if (!GameWasAlreadyPaused) {
-			PauseMode = 0;
-		}
+	music_mute();
+
+	MinimizePaused = true;
+}
 
-		music_unmute();
+void diablo_focus_unpause()
+{
+	if (gbIsMultiplayer || !MinimizePaused)
+	{
+		return;
 	}
 
-	MinimizePaused = !MinimizePaused;
+	if (!GameWasAlreadyPaused) {
+		PauseMode = 0;
+	}
+
+	music_unmute();
+
+	MinimizePaused = false;
 }
 
 bool PressEscKey()
@@ -2101,6 +2109,10 @@ void LoadGameLevel(bool firstflag, lvl_entry lvldir)
 	else
 		music_start(leveltype);
 
+	if (MinimizePaused) {
+		music_mute();
+	}
+
 	while (!IncProgress())
 		;
 

Source/diablo.h

@@ -76,6 +76,7 @@ int DiabloMain(int argc, char **argv);
 bool TryIconCurs();
 void diablo_pause_game();
 void diablo_focus_pause();
+void diablo_focus_unpause();
 bool PressEscKey();
 void DisableInputWndProc(uint32_t uMsg, int32_t wParam, int32_t lParam);
 void LoadGameLevel(bool firstflag, lvl_entry lvldir);

Source/miniwin/misc_msg.cpp

@@ -567,10 +567,10 @@ bool FetchMessage(tagMSG *lpMsg)
 			break;
 
 		case SDL_WINDOWEVENT_FOCUS_LOST:
+			diablo_focus_pause();
+			break;
 		case SDL_WINDOWEVENT_FOCUS_GAINED:
-			if (gbRunGameResult) {
-				diablo_focus_pause();
-			}
+			diablo_focus_unpause();
 			break;
 
 		default: