Original commit message from CVS:
* correct a condition in check-libheader.m4
* remove gst a52 and mpeg2dec m4's in favor of ones i have sent to
walken for inclusion in the upstream packages
Original commit message from CVS:
- CHECK_LIBHEADER macro, which is based on GST_CHECK_LIBHEADER
the main difference between them is that you can specify cpp flags with
CHECK_LIBHEADER