directsoundsrc: Fix critical due to missing debug category initialization

https://bugzilla.gnome.org/show_bug.cgi?id=727812
diff --git a/sys/directsound/gstdirectsoundsrc.c b/sys/directsound/gstdirectsoundsrc.c
index 2cc89f3..11063ca 100644
--- a/sys/directsound/gstdirectsoundsrc.c
+++ b/sys/directsound/gstdirectsoundsrc.c
@@ -158,6 +158,9 @@
   gstbasesrc_class = (GstBaseSrcClass *) klass;
   gstaudiosrc_class = (GstAudioSrcClass *) klass;
 
+  GST_DEBUG_CATEGORY_INIT (directsoundsrc_debug, "directsoundsrc", 0,
+      "DirectSound Src");
+
   GST_DEBUG ("initializing directsoundsrc class");
 
   gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_directsound_src_finalize);
@@ -178,9 +181,6 @@
   gstaudiosrc_class->delay = GST_DEBUG_FUNCPTR (gst_directsound_src_delay);
   gstaudiosrc_class->reset = GST_DEBUG_FUNCPTR (gst_directsound_src_reset);
 
-  GST_DEBUG_CATEGORY_INIT (directsoundsrc_debug, "directsoundsrc", 0,
-      "DirectSound Src");
-
   gst_element_class_set_static_metadata (gstelement_class,
       "DirectSound audio source", "Source/Audio",
       "Capture from a soundcard via DirectSound",