made it so music on intro has less interference

src/preferences.cpp

@@ -597,7 +597,7 @@ void show_preferences_dialog(display& disp)
 		
 		disp.update_display();
 
-		SDL_Delay(10);
+		SDL_Delay(50);
 		events::pump();
 	}
 }

src/show_dialog.cpp

@@ -803,7 +803,7 @@ TITLE_RESULT show_title(display& screen)
 
 		events::pump();
 
-		SDL_Delay(20);
+		SDL_Delay(50);
 	}
 
 	return QUIT_GAME;