NetworkControl: align buffer end based on latest changes in thunder d…

…ata element (#806)

Co-authored-by: Pierre Wielders <pierre@wielders.net>

NetworkControl/NetworkControlImplementation.cpp

@@ -1355,7 +1355,7 @@ namespace Plugin
 
                 } while ((index < file.Size()) && (offset != endMarker.length()));
 
-                end = index;
+                end = ((index != 0) && (index == file.Size())) ? index - 1 : index;
                 uint16_t reduction = end - start;
 
                 if ((reduction != 0) && ((file.Size() - end) != 0)) {