lavf: add missing build dependency for tta demuxer

Signed-off-by: Paul B Mahol <onemda@gmail.com>

libavformat/Makefile

@@ -374,7 +374,7 @@ OBJS-$(CONFIG_MKVTIMESTAMP_V2_MUXER)     += mkvtimestamp_v2.o
 OBJS-$(CONFIG_TMV_DEMUXER)               += tmv.o
 OBJS-$(CONFIG_TRUEHD_DEMUXER)            += rawdec.o
 OBJS-$(CONFIG_TRUEHD_MUXER)              += rawenc.o
-OBJS-$(CONFIG_TTA_DEMUXER)               += tta.o apetag.o
+OBJS-$(CONFIG_TTA_DEMUXER)               += tta.o apetag.o img2.o
 OBJS-$(CONFIG_TTY_DEMUXER)               += tty.o sauce.o
 OBJS-$(CONFIG_TXD_DEMUXER)               += txd.o
 OBJS-$(CONFIG_VC1_DEMUXER)               += rawdec.o