Don't warn with zero size with RESIZABLE

Author: damusss

src_c/display.c

@@ -871,6 +871,7 @@ pg_set_mode(PyObject *self, PyObject *arg, PyObject *kwds)
     SDL_Surface *newownedsurf = NULL;
     int depth = 0;
     int flags = 0;
+    int zero_size = 0;
     int w, h, w_actual, h_actual;
     PyObject *size = NULL;
     int vsync = SDL_FALSE;
@@ -988,8 +989,7 @@ pg_set_mode(PyObject *self, PyObject *arg, PyObject *kwds)
            desktop resolution without breaking compatibility. */
             w = display_mode.w;
             h = display_mode.h;
-            w_actual = w; /* avoid warning false positives */
-            h_actual = h;
+            zero_size = 1;
         }
 
         if (flags & PGS_FULLSCREEN) {
@@ -1434,7 +1434,7 @@ pg_set_mode(PyObject *self, PyObject *arg, PyObject *kwds)
      * be respected enough that we don't need to issue a warning
      */
     if (!state->using_gl && ((flags & (PGS_SCALED | PGS_FULLSCREEN)) == 0) &&
-        !vsync) {
+        !vsync && (((flags & PGS_RESIZABLE) == 0) || !zero_size)) {
         if (((surface->surf->w != w_actual) ||
              (surface->surf->h != h_actual)) &&
             ((surface->surf->flags & SDL_WINDOW_FULLSCREEN_DESKTOP) != 0)) {