Fix tests

dgl/src/OpenGL.cpp

@@ -681,8 +681,10 @@ void Window::PrivateData::renderToPicture(const char* const filename,
     glReadPixels(0, 0, width, height, GL_RGB, GL_UNSIGNED_BYTE, pixels);
 
     fprintf(f, "P3\n%d %d\n255\n", width, height);
-    for (uint y = 0; y < height; y++) {
-        for (uint i, x = 0; x < width; x++) {
+    for (uint y = 0; y < height; y++)
+    {
+        for (uint i, x = 0; x < width; x++)
+        {
             i = 3 * ((height - y - 1) * width + x);
             fprintf(f, "%3d %3d %3d ", pixels[i], pixels[i+1], pixels[i+2]);
         }

dgl/src/WindowPrivateData.cpp

@@ -748,7 +748,6 @@ void Window::PrivateData::onPuglExpose()
         if (widget->isVisible())
             widget->pData->display();
     }
-#endif
 
     if (char* const filename = filenameToRenderInto)
     {
@@ -757,6 +756,7 @@ void Window::PrivateData::onPuglExpose()
         renderToPicture(filename, getGraphicsContext(), static_cast<uint>(rect.width), static_cast<uint>(rect.height));
         std::free(filename);
     }
+#endif
 }
 
 void Window::PrivateData::onPuglClose()