metadata: Merge memory_format correctly

src/metadata.rs

@@ -110,6 +110,9 @@ impl Metadata {
         if self.frame_info.is_none() {
             self.frame_info = other.frame_info;
         }
+        if self.memory_format.is_none() {
+            self.memory_format = other.memory_format;
+        }
     }
 
     pub fn mime_type(&self) -> Option<String> {

src/widgets/image/background_color.rs

@@ -58,6 +58,8 @@ impl imp::LpImage {
     pub async fn background_color_guess(&self) -> Option<gdk::RGBA> {
         let obj = self.obj();
 
+        log::debug!("Determining background color");
+
         if self.fixed_background_color.borrow().is_some() {
             return None;
         }