Revision 1617

	encoder.c: simplify_time() optimized by Euclid.

	bitstream.c: write_video_packet_header() was buggy and
	kind of obfuscated, as noticed by Sigdrak at free.fr.

	from Edouard:

	gcc4 warning removal.
	- No executable shared objects installed
	  (Do not install the lib as executable. It's no use as the SO has no
 	   main symbol anyway, and the static lib is not runnable anyway.)
	- Statically link xvid_bench with libxvidcore.a
	- New autoconf garbage removal
	- Quotes in configure.in