make sure gOverlayFrame is valid

Bumps wiiu-env/devkitppc from 20240423 to 20240505.

---
updated-dependencies:
- dependency-name: wiiu-env/devkitppc
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Dockerfile

@@ -1,4 +1,4 @@
-FROM ghcr.io/wiiu-env/devkitppc:20240423
+FROM ghcr.io/wiiu-env/devkitppc:20240505
 
 COPY --from=ghcr.io/wiiu-env/libnotifications:20240426 /artifacts $DEVKITPRO
 COPY --from=ghcr.io/wiiu-env/libmappedmemory:20230621 /artifacts $DEVKITPRO

src/function_patches.cpp

@@ -72,6 +72,9 @@ void drawScreenshotSavedTexture2(GX2ColorBuffer *colorBuffer, GX2ScanTarget scan
 }
 
 static void TryAddFromQueue() {
+    if (!gOverlayFrame) {
+        return;
+    }
     std::lock_guard overlay_lock(gOverlayFrameMutex);
     // Add notification that had been called before the overlay was ready
     for (const auto &notification : gOverlayQueueDuringStartup) {