Add the dependency for mpeg4audio.o of the ALS decoder.

Originally committed as revision 21893 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/Makefile

@@ -50,7 +50,7 @@ OBJS-$(CONFIG_AC3_DECODER)             += ac3dec.o ac3dec_data.o ac3.o
 OBJS-$(CONFIG_AC3_ENCODER)             += ac3enc.o ac3tab.o ac3.o
 OBJS-$(CONFIG_ALAC_DECODER)            += alac.o
 OBJS-$(CONFIG_ALAC_ENCODER)            += alacenc.o
-OBJS-$(CONFIG_ALS_DECODER)             += alsdec.o bgmc.o
+OBJS-$(CONFIG_ALS_DECODER)             += alsdec.o bgmc.o mpeg4audio.o
 OBJS-$(CONFIG_AMV_DECODER)             += sp5xdec.o mjpegdec.o mjpeg.o
 OBJS-$(CONFIG_ANM_DECODER)             += anm.o
 OBJS-$(CONFIG_APE_DECODER)             += apedec.o