Original commit message from CVS:
* configure.ac:
Fix typo: libswcale -> libswscale for the pkg-config check.
* ext/libswscale/gstffmpegscale.c:
Fix include path, newer ffmpeg installs the headers for all
libraries into separate directories. Fixes bug #560137.
Original commit message from CVS:
* ext/ffmpeg/Makefile.am:
* ext/libpostproc/Makefile.am:
* ext/libswscale/Makefile.am:
Don't install static libs for plugins. Fixes#550851 for -ffmpeg.