Fix #337365 (g_type_class_ref <-> g_type_class_peek_parent)

Original commit message from CVS:
* ext/amrwb/gstamrwbdec.c: (gst_amrwbdec_class_init):
* ext/amrwb/gstamrwbenc.c: (gst_amrwbenc_class_init):
* ext/amrwb/gstamrwbparse.c: (gst_amrwbparse_class_init):
* ext/arts/gst_arts.c: (gst_arts_class_init):
* ext/artsd/gstartsdsink.c: (gst_artsdsink_class_init):
* ext/audiofile/gstafsink.c: (gst_afsink_class_init):
* ext/audiofile/gstafsrc.c: (gst_afsrc_class_init):
* ext/audioresample/gstaudioresample.c:
* ext/cdaudio/gstcdaudio.c: (gst_cdaudio_class_init):
* ext/directfb/dfbvideosink.c: (gst_dfbvideosink_class_init):
* ext/divx/gstdivxdec.c: (gst_divxdec_class_init):
* ext/hermes/gsthermescolorspace.c:
(gst_hermes_colorspace_class_init):
* ext/ivorbis/vorbisfile.c: (gst_ivorbisfile_class_init):
* ext/jack/gstjack.c: (gst_jack_class_init):
* ext/jack/gstjackbin.c: (gst_jack_bin_class_init):
* ext/lcs/gstcolorspace.c: (gst_colorspace_class_init):
* ext/libfame/gstlibfame.c: (gst_fameenc_class_init):
* ext/musicbrainz/gsttrm.c: (gst_musicbrainz_class_init):
* ext/nas/nassink.c: (gst_nassink_class_init):
* ext/shout/gstshout.c: (gst_icecastsend_class_init):
* ext/snapshot/gstsnapshot.c: (gst_snapshot_class_init):
* ext/sndfile/gstsf.c: (gst_sf_class_init):
* ext/swfdec/gstswfdec.c: (gst_swfdecbuffer_class_init),
(gst_swfdec_class_init):
* ext/tarkin/gsttarkindec.c: (gst_tarkindec_class_init):
* ext/tarkin/gsttarkinenc.c: (gst_tarkinenc_class_init):
* gst/cdxaparse/gstcdxastrip.c: (gst_cdxastrip_class_init):
* gst/chart/gstchart.c: (gst_chart_class_init):
* gst/colorspace/gstcolorspace.c: (gst_colorspace_class_init):
* gst/deinterlace/gstdeinterlace.c: (gst_deinterlace_class_init):
* gst/festival/gstfestival.c: (gst_festival_class_init):
* gst/filter/gstbpwsinc.c: (gst_bpwsinc_class_init):
* gst/filter/gstiir.c: (gst_iir_class_init):
* gst/filter/gstlpwsinc.c: (gst_lpwsinc_class_init):
* gst/librfb/gstrfbsrc.c: (gst_rfbsrc_class_init):
* gst/mixmatrix/mixmatrix.c: (gst_mixmatrix_class_init):
* gst/mpeg1sys/gstmpeg1systemencode.c:
(gst_system_encode_class_init):
* gst/mpeg1videoparse/gstmp1videoparse.c:
(gst_mp1videoparse_class_init):
* gst/mpeg2sub/gstmpeg2subt.c: (gst_mpeg2subt_class_init):
* gst/mpegaudioparse/gstmpegaudioparse.c:
(gst_mp3parse_class_init):
* gst/overlay/gstoverlay.c: (gst_overlay_class_init):
* gst/passthrough/gstpassthrough.c: (passthrough_class_init):
* gst/playondemand/gstplayondemand.c: (play_on_demand_class_init):
* gst/rtjpeg/gstrtjpegdec.c: (gst_rtjpegdec_class_init):
* gst/rtjpeg/gstrtjpegenc.c: (gst_rtjpegenc_class_init):
* gst/smooth/gstsmooth.c: (gst_smooth_class_init):
* gst/smoothwave/gstsmoothwave.c: (gst_smoothwave_class_init):
* gst/spectrum/gstspectrum.c: (gst_spectrum_class_init):
* gst/stereo/gststereo.c: (gst_stereo_class_init):
* gst/switch/gstswitch.c: (gst_switch_class_init):
* gst/tta/gstttadec.c: (gst_tta_dec_class_init):
* gst/tta/gstttaparse.c: (gst_tta_parse_class_init):
* gst/vbidec/gstvbidec.c: (gst_vbidec_class_init):
* gst/videocrop/gstvideocrop.c: (gst_video_crop_class_init):
* gst/virtualdub/gstxsharpen.c: (gst_xsharpen_class_init):
* gst/y4m/gsty4mencode.c: (gst_y4mencode_class_init):
* sys/cdrom/gstcdplayer.c: (cdplayer_class_init):
* sys/directsound/gstdirectsoundsink.c:
(gst_directsoundsink_class_init):
* sys/dxr3/dxr3audiosink.c: (dxr3audiosink_class_init):
* sys/dxr3/dxr3spusink.c: (dxr3spusink_class_init):
* sys/dxr3/dxr3videosink.c: (dxr3videosink_class_init):
* sys/qcam/gstqcamsrc.c: (gst_qcamsrc_class_init):
* sys/v4l2/gstv4l2colorbalance.c:
(gst_v4l2_color_balance_channel_class_init):
* sys/v4l2/gstv4l2tuner.c: (gst_v4l2_tuner_channel_class_init),
(gst_v4l2_tuner_norm_class_init):
* sys/ximagesrc/ximagesrc.c: (gst_ximagesrc_class_init):
Fix #337365 (g_type_class_ref <-> g_type_class_peek_parent)

ext/jack/gstjack.c

@@ -202,7 +202,7 @@ gst_jack_class_init (GstJackClass * klass)
   element_class = (GstElementClass *) klass;
 
   if (parent_class == NULL)
-    parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
+    parent_class = g_type_class_peek_parent (klass);
 
   object_class->get_property = gst_jack_get_property;
   object_class->set_property = gst_jack_set_property;

ext/jack/gstjackbin.c

@@ -81,7 +81,7 @@ gst_jack_bin_class_init (GstJackBinClass * klass)
   object_class = (GObjectClass *) klass;
   element_class = (GstElementClass *) klass;
 
-  parent_class = g_type_class_ref (GST_TYPE_BIN);
+  parent_class = g_type_class_peek_parent (klass);
 
   element_class->change_state = gst_jack_bin_change_state;
 }