st/nine: Ignore window size if error

Check GetWindowInfo and ignore the computed sizes
if there is an error.

Fixes a regression caused by earlier commit when
using old wine gallium nine patches.

Should also address a crash at window destruction.

Related issues:
 https://github.com/iXit/Mesa-3D/issues/331
 https://github.com/iXit/Mesa-3D/issues/332

Cc: mesa-stable@lists.freedesktop.org
Fixes: 2318ca68bb ("st/nine: Handle window resize when a presentation
buffer is used")

Signed-off-by: Axel Davy <davyaxel0@gmail.com>

src/gallium/state_trackers/nine/swapchain9.c

@@ -750,9 +750,16 @@ present( struct NineSwapChain9 *This,
     if (This->params.SwapEffect == D3DSWAPEFFECT_DISCARD)
         handle_draw_cursor_and_hud(This, resource);
 
-    ID3DPresent_GetWindowInfo(This->present, hDestWindowOverride, &target_width, &target_height, &target_depth);
+    hr = ID3DPresent_GetWindowInfo(This->present, hDestWindowOverride, &target_width, &target_height, &target_depth);
     (void)target_depth;
 
+    /* Can happen with old Wine (presentation can still succeed),
+     * or at window destruction. */
+    if (FAILED(hr) || target_width == 0 || target_height == 0) {
+        target_width = resource->width0;
+        target_height = resource->height0;
+    }
+
     /* Switch to using presentation buffers on window resize.
      * Note: Most apps should resize the d3d back buffers when
      * a window resize is detected, which will result in a call to