autoconvert: fix compiler warnings with g_atomic on recent GLib versions

The volatile is not needed here and causes compiler warnings
with newer GLib versions.

gstautoconvert.c: In function ‘gst_auto_convert_dispose’ (and elsewhere):
glib/gatomic.h:108:3: warning: initialization discards ‘volatile’ qualifier from pointer target type [-Wdiscarded-qualifiers]
gstautoconvert.c:224:24: note: in expansion of macro ‘g_atomic_pointer_get’
  224 |     GList *factories = g_atomic_pointer_get (&autoconvert->factories);

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1237>

1 files changed, 1 insertions, 1 deletions

diff --git a/gst/autoconvert/gstautoconvert.h b/gst/autoconvert/gstautoconvert.h
index ae40e63ee..eaa4f02c9 100644
--- a/gst/autoconvert/gstautoconvert.h
+++ b/gst/autoconvert/gstautoconvert.h
@@ -41,7 +41,7 @@ struct _GstAutoConvert
   /*< private >*/
   GstBin bin;                   /* we extend GstBin */
 
-  volatile GList *factories;
+  GList *factories;
 
   GstPad *sinkpad;
   GstPad *srcpad;