add function Get_image_mode()

just as there is Set_image_mode()

src/loadsave.c

@@ -360,6 +360,11 @@ void Set_image_mode(T_IO_Context *context, enum IMAGE_MODES mode)
   }
 }
 
+enum IMAGE_MODES Get_image_mode(T_IO_Context *context)
+{
+  return Main.backups->Pages->Image_mode;
+}
+
 ///
 /// Generic allocation and similar stuff, done at beginning of image load,
 /// as soon as size is known.

src/loadsave.h

@@ -229,6 +229,8 @@ void Set_frame_duration(T_IO_Context *context, int duration);
 int Get_frame_duration(T_IO_Context *context);
 /// Function to set a specific image mode
 void Set_image_mode(T_IO_Context *context, enum IMAGE_MODES mode);
+/// get the current image mode
+enum IMAGE_MODES Get_image_mode(T_IO_Context *context);
 
 // =================================================================
 // What follows here are the definitions of functions and data

src/miscfileformats.c

@@ -5768,7 +5768,7 @@ void Load_FLI(T_IO_Context * context)
         else
         {
           Set_loading_layer(context, current_frame);
-          if (context->Type == CONTEXT_MAIN_IMAGE && Main.backups->Pages->Image_mode == IMAGE_MODE_ANIMATION)
+          if (context->Type == CONTEXT_MAIN_IMAGE && Get_image_mode(context) == IMAGE_MODE_ANIMATION)
           {
             // Copy the content of previous frame
             memcpy(

src/tests/mockloadsave.c

@@ -84,6 +84,11 @@ void Set_image_mode(T_IO_Context *context, enum IMAGE_MODES mode)
   printf("Set_image_mode(%p, %d)\n", context, mode);
 }
 
+enum IMAGE_MODES Get_image_mode(T_IO_Context *context)
+{
+  return -1;
+}
+
 void Set_frame_duration(T_IO_Context *context, int duration)
 {
   printf("Set_frame_duration(%p, %d)\n", context, duration);