Fix dependency: generated table is needed to create the mpegaudiodec.o file, not the .c one.

Originally committed as revision 20403 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/Makefile

@@ -710,6 +710,6 @@ endif
 $(SUBDIR)%_tablegen$(HOSTEXESUF): $(SUBDIR)%_tablegen.c $(SUBDIR)tableprint.c
 	$(HOSTCC) $(HOSTCFLAGS) $(HOSTLDFLAGS) -o $@ $^ $(HOSTLIBS)
 
-$(SUBDIR)mpegaudiodec.c: $(SUBDIR)mpegaudio_tables.h
+$(SUBDIR)mpegaudiodec.o: $(SUBDIR)mpegaudio_tables.h
 $(SUBDIR)%_tables.h: $(SUBDIR)%_tablegen$(HOSTEXESUF)
 	./$< > $@