Windows SDL 1.x: Move DIB window parent shutdown to SQL_Quit. Don't s…

…hutdown parent window with SQL_QuitSubSystem(). This fixes a problem where DOSBox-X's OpenGL initialization causes the window to disappear, and then reappear, often below the next active window on the desktop.

vs2015/sdl/src/SDL.c

@@ -221,6 +221,12 @@ void SDL_Quit(void)
 #endif
 	SDL_QuitSubSystem(SDL_INIT_EVERYTHING);
 
+#if defined(WIN32)
+	// windib
+	void StopParentWindow(void);
+	StopParentWindow();
+#endif
+
 #ifdef CHECK_LEAKS
 #ifdef DEBUG_BUILD
   printf("[SDL_Quit] : CHECK_LEAKS\n"); fflush(stdout);

vs2015/sdl/src/video/windib/SDL_dibevents.c

@@ -974,7 +974,9 @@ void DIB_DestroyWindow(_THIS)
 		DestroyWindow(SDL_Window);
 	}
 
-	StopParentWindow();
+// NTS: DOSBox-X likes to call SQL_Quit/SQL_QuitSubSystem just to reinit the window.
+//      It's better if the parent window doesn't disappear and reappear.
+//	StopParentWindow();
 
 	SDL_UnregisterApp();