[gnome-media] Fix a crash issue in the gnome_volume_control_element_whitelist function.

[Brian Cameron <bcameron src gnome org>]

commit b66b368853a26e2493d0742a0851d79f1c63c71a
Author: Brian Cameron <Brian Cameron sun com>
Date:   Wed Aug 19 01:03:35 2009 -0500

    Fix a crash issue in the gnome_volume_control_element_whitelist function.
    This fix avoids trying to access the track variable before first checking
    and handling if it is NULL.

 gst-mixer/src/element.c |   18 +++++++++---------
 1 files changed, 9 insertions(+), 9 deletions(-)
---
diff --git a/gst-mixer/src/element.c b/gst-mixer/src/element.c
index 262dd23..9874d30 100644
--- a/gst-mixer/src/element.c
+++ b/gst-mixer/src/element.c
@@ -112,15 +112,6 @@ gnome_volume_control_element_whitelist (GstMixer *mixer,
   gint i, pos;
   gboolean found = FALSE;
 
-  /* honor the mixer supplied hints about whitelisting if available */
-  if (gst_mixer_get_mixer_flags (GST_MIXER (mixer)) & GST_MIXER_FLAG_HAS_WHITELIST) {
-    if (GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_WHITELIST)) {
-      return (TRUE);
-    } else {
-      return (FALSE);
-    }
-  }
-
   /* Yes this is a hack. */
   static struct {
     gchar *label;
@@ -155,6 +146,15 @@ gnome_volume_control_element_whitelist (GstMixer *mixer,
     return TRUE;
   }
 
+  /* honor the mixer supplied hints about whitelisting if available */
+  if (gst_mixer_get_mixer_flags (GST_MIXER (mixer)) & GST_MIXER_FLAG_HAS_WHITELIST) {
+    if (GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_WHITELIST)) {
+      return (TRUE);
+    } else {
+      return (FALSE);
+    }
+  }
+
   for (i = 0; !found && list[i].label != NULL; i++) {
     gchar *label_l = NULL;