ext/ffmpeg/gstffmpegcolorspace.c: Fixing the pad_alloc_buffer implementation to use...

ext/ffmpeg/gstffmpegcolorspace.c: Fixing the pad_alloc_buffer implementation to use ->srcpad

Original commit message from CVS:
2004-01-11  Julien MOUTTE  <julien@moutte.net>

* ext/ffmpeg/gstffmpegcolorspace.c: (gst_ffmpegcsp_chain): Fixing the
pad_alloc_buffer implementation to use ->srcpad
* ext/hermes/gstcolorspace.c: (gst_colorspace_chain): Fixing the
pad_alloc_buffer implementation to use ->srcpad
* gst/videoscale/gstvideoscale.c: (gst_videoscale_chain):  Fixing the
pad_alloc_buffer implementation to use ->srcpad
* sys/ximage/ximagesink.c: (gst_ximagesink_ximage_new),
(gst_ximagesink_chain), (gst_ximagesink_buffer_free),
(gst_ximagesink_buffer_alloc): Now only use GST_BUFFER_PRIVATE to keep
a reference to everything we need.
* sys/ximage/ximagesink.h: adding a reference to the sink in the image.
* sys/xvimage/xvimagesink.c: (gst_xvimagesink_xvimage_new),
(gst_xvimagesink_chain), (gst_xvimagesink_buffer_free),
(gst_xvimagesink_buffer_alloc): Now only use GST_BUFFER_PRIVATE to keep
a reference to everything we need.
* sys/xvimage/xvimagesink.h: adding a reference to the sink in the image