Fix invalid file paths causing unexpected behavior

src/animationloader.cpp

@@ -25,6 +25,17 @@ void AnimationLoader::load(const QString &fileName)
   {
     return;
   }
+  else if (fileName == QObject::tr("Invalid File"))
+  {
+    // Set the image to a null pixmap if it's invalid
+    stopLoading();
+    m_size = QSize(1, 1);
+    m_frames.clear();
+    m_frames.append(AnimationFrame(QPixmap(), 0));
+    m_frame_count = 1;
+    m_loop_count = 0;
+    return;
+  }
   stopLoading();
   m_file_name = fileName;
   QImageReader *reader = new QImageReader;