Backport of "gstgiosrc: Don't leak scheme string in gst_gio_src_query()" into 1.18
Backport of !1078 (merged) "gstgiosrc: Don't leak scheme string in gst_gio_src_query()".
Commits:
- 0444cf8f gstgiosrc: Don't leak scheme string in gst_gio_src_query()