gst/ffmpegcolorspace/: #318353); use gst_structure_has_name().

gst/ffmpegcolorspace/: #318353); use gst_structure_has_name().

Original commit message from CVS:
* gst/ffmpegcolorspace/gstffmpegcodecmap.c:
(gst_ffmpeg_pixfmt_to_caps), (gst_ffmpeg_caps_to_pixfmt):
* gst/ffmpegcolorspace/gstffmpegcolorspace.c:
(gst_ffmpegcsp_caps_remove_format_info):
* gst/ffmpegcolorspace/imgconvert.c:
* gst/ffmpegcolorspace/imgconvert_template.h:
Forward-port fixes from the 0.8 branch (patch by Luca Ognibene,
#318353); use gst_structure_has_name().