[GStreamer][MediaStream] gst_object_get_path_string() leaking in medi…

…astreamsrc element

https://bugs.webkit.org/show_bug.cgi?id=272752

Reviewed by Xabier Rodriguez-Calvar.

Fix string leak webkitMediaStreamSrcAddPad().

* Source/WebCore/platform/mediastream/gstreamer/GStreamerMediaStreamSource.cpp:
(webkitMediaStreamSrcAddPad):

Canonical link: https://commits.webkit.org/277599@main

Source/WebCore/platform/mediastream/gstreamer/GStreamerMediaStreamSource.cpp

@@ -973,7 +973,10 @@ static void webkitMediaStreamSrcEnsureStreamCollectionPosted(WebKitMediaStreamSr
 
 static void webkitMediaStreamSrcAddPad(WebKitMediaStreamSrc* self, GstPad* target, GstStaticPadTemplate* padTemplate, GRefPtr<GstTagList>&& tags, const String& padName)
 {
-    GST_DEBUG_OBJECT(self, "%s Ghosting %" GST_PTR_FORMAT, gst_object_get_path_string(GST_OBJECT_CAST(self)), target);
+#ifndef GST_DISABLE_GST_DEBUG
+    GUniquePtr<char> objectPath(gst_object_get_path_string(GST_OBJECT_CAST(self)));
+    GST_DEBUG_OBJECT(self, "%s Ghosting %" GST_PTR_FORMAT, objectPath.get(), target);
+#endif
 
     auto* ghostPad = webkitGstGhostPadFromStaticTemplate(padTemplate, padName.ascii().data(), target);
     gst_pad_set_active(ghostPad, TRUE);