Original commit message from CVS:
* gst/avi/gstavidemux.c:
add an explicit dll imported declaration for GST_CAT_EVENT+WIN32
* win32/MANIFEST:
sort file listing
* win32/vs6/libgstavi.dsp:
add gstavimux.c to the project
* win32/vs6/libgstid3demux.dsp:
add link to zlib library
* win32/vs6/libgstmatroska.dsp:
add matroska-ids.c to the project