[7833] breaks compilation for mpegvideo_mmx.o

[bjm <bjm@…>]

gcc -c -pipe -march=pentiumpro -w -g -O -D_REENTRANT  -DMMX -Di386 -DUSING_DBOX2 -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -DPREFIX=\"/usr/local\" -DHAVE_AV_CONFIG_H -D_LARGEFILE_SOURCE -DQT_THREAD_SUPPORT -DQT_SHARED -DQT_TABLET_SUPPORT -I/usr/share/qt3/mkspecs/default -I. -I.. -I../.. -I../libavutil -I/usr/include/qt3 -o mpegvideo_mmx.o i386/mpegvideo_mmx.c
{standard input}: Assembler messages:
{standard input}:1218: Error: missing ')'
{standard input}:1218: Error: junk `(%ebp),%eax)' after expression
{standard input}:2078: Error: missing ')'
{standard input}:2078: Error: junk `(%ebp),%eax)' after expression
{standard input}:2932: Error: missing ')'
{standard input}:2932: Error: junk `(%ebp),%eax)' after expression
make[2]: *** [mpegvideo_mmx.o] Error 1
make[2]: Leaving directory `/home/bjm/m/debug/mythtv/libs/libavcodec'
make[1]: *** [sub-libavcodec] Error 2
make[1]: Leaving directory `/home/bjm/m/debug/mythtv/libs'
make: *** [sub-libs] Error 2

[danielk]

(In [7837]) Fixes #631, references #542. Third time 's the charm?