avformat/Makefile: Fix aiffdec replaygain dependency

Forgotten in 6390f52a.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavformat/Makefile

@@ -82,7 +82,7 @@ OBJS-$(CONFIG_ADX_MUXER)                 += rawenc.o
 OBJS-$(CONFIG_AEA_DEMUXER)               += aea.o pcm.o
 OBJS-$(CONFIG_AFC_DEMUXER)               += afc.o
 OBJS-$(CONFIG_AIFF_DEMUXER)              += aiffdec.o pcm.o isom.o \
-                                            mov_chan.o
+                                            mov_chan.o replaygain.o
 OBJS-$(CONFIG_AIFF_MUXER)                += aiffenc.o id3v2enc.o
 OBJS-$(CONFIG_AIX_DEMUXER)               += aixdec.o
 OBJS-$(CONFIG_AMR_DEMUXER)               += amr.o