imagefreeze: Return TRUE from the LATENCY query handling

We always answer it successfully no matter what.

The default return value in the function is FALSE even if the code below
sets it again to FALSE.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/654>

gst/imagefreeze/gstimagefreeze.c

@@ -576,6 +576,7 @@ gst_image_freeze_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
          * can according to the negotiated framerate */
         gst_query_set_latency (query, FALSE, 0, GST_CLOCK_TIME_NONE);
       }
+      ret = TRUE;
       break;
     default:
       ret = FALSE;