Add missing entry for ADPCM_IMA_QT_ENCODER.

patch by Peter Ross, pross xvid org

Originally committed as revision 13883 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/Makefile

@@ -287,6 +287,7 @@ OBJS-$(CONFIG_ADPCM_IMA_DK4_DECODER)   += adpcm.o
 OBJS-$(CONFIG_ADPCM_IMA_EA_EACS_DECODER) += adpcm.o
 OBJS-$(CONFIG_ADPCM_IMA_EA_SEAD_DECODER) += adpcm.o
 OBJS-$(CONFIG_ADPCM_IMA_QT_DECODER)    += adpcm.o
+OBJS-$(CONFIG_ADPCM_IMA_QT_ENCODER)    += adpcm.o
 OBJS-$(CONFIG_ADPCM_IMA_SMJPEG_DECODER) += adpcm.o
 OBJS-$(CONFIG_ADPCM_IMA_WAV_DECODER)   += adpcm.o
 OBJS-$(CONFIG_ADPCM_IMA_WAV_ENCODER)   += adpcm.o