Base SDL3: shrink diff a bit more

Author: Starbuck5

src_c/base.c

@@ -2080,15 +2080,13 @@ PG_PixelFormatEnum pg_default_convert_format = 0;
 static PG_PixelFormatEnum
 pg_GetDefaultConvertFormat(void)
 {
-#if SDL_VERSION_ATLEAST(3, 0, 0)
     if (pg_default_screen) {
+#if SDL_VERSION_ATLEAST(3, 0, 0)
         return pg_default_screen->surf->format;
-    }
 #else
-    if (pg_default_screen) {
         return pg_default_screen->surf->format->format;
-    }
 #endif
+    }
     return pg_default_convert_format;
 }
 

src_c/surface.c

@@ -1589,11 +1589,7 @@ pg_DisplayFormat(SDL_Surface *surface)
             " or Window.get_surface().");
         return NULL;
     }
-#if SDL_VERSION_ATLEAST(3, 0, 0)
-    return SDL_ConvertSurface(surface, default_format);
-#else
-    return SDL_ConvertSurfaceFormat(surface, default_format, 0);
-#endif
+    return PG_ConvertSurfaceFormat(surface, default_format);
 }
 
 static SDL_Surface *
@@ -1616,9 +1612,6 @@ pg_DisplayFormatAlpha(SDL_Surface *surface)
 #endif
         case SDL_PIXELFORMAT_ABGR1555:
         case SDL_PIXELFORMAT_BGR565:
-            pfe = SDL_PIXELFORMAT_ABGR8888;
-            break;
-
         case PG_PIXELFORMAT_XBGR8888:
         case SDL_PIXELFORMAT_ABGR8888:
             pfe = SDL_PIXELFORMAT_ABGR8888;