fix activity crash on options menu selected

Signed-off-by: parneet-guraya <gurayaparneet@gmail.com>

app/src/main/java/com/owncloud/android/ui/preview/PreviewImageActivity.java

@@ -205,7 +205,7 @@ public class PreviewImageActivity extends FileActivity implements
             }
             return true;
         } else {
-            return onOptionsItemSelected(item);
+            return super.onOptionsItemSelected(item);
         }
     }