Fix build against core CVS.

Fix build against core CVS.

Original commit message from CVS:
* ext/cairo/gsttimeoverlay.c: (gst_cairo_time_overlay_transform):
* ext/jpeg/gstjpegenc.c: (gst_jpegenc_chain):
* ext/libpng/gstpngenc.c: (gst_pngenc_chain):
* ext/wavpack/gstwavpackdec.c: (gst_wavpack_dec_chain):
* gst/debug/gstnavigationtest.c: (gst_navigationtest_transform):
* gst/effectv/gstaging.c: (gst_agingtv_transform):
* gst/effectv/gstdice.c: (gst_dicetv_transform):
* gst/effectv/gstedge.c: (gst_edgetv_transform):
* gst/effectv/gstquark.c: (gst_quarktv_transform):
* gst/effectv/gstrev.c: (gst_revtv_transform):
* gst/effectv/gstshagadelic.c: (gst_shagadelictv_transform):
* gst/effectv/gstvertigo.c: (gst_vertigotv_transform):
* gst/effectv/gstwarp.c: (gst_warptv_transform):
* gst/matroska/matroska-demux.c:
(gst_matroska_demux_add_wvpk_header),
(gst_matroska_demux_check_subtitle_buffer),
(gst_matroska_decode_buffer):
* gst/videofilter/gstvideoflip.c: (gst_video_flip_transform):
Fix build against core CVS.