Make XVMC mpegvideo decoder depend on mpegvideo decoder.

It makes no sense to enable the former without the latter.

Originally committed as revision 19565 to svn://svn.ffmpeg.org/ffmpeg/trunk

configure

@@ -1097,6 +1097,7 @@ mpeg2_vaapi_hwaccel_select="vaapi mpeg2video_decoder"
 mpeg4_vaapi_hwaccel_deps="va_va_h"
 mpeg4_vaapi_hwaccel_select="vaapi mpeg4_decoder"
 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
+mpeg_xvmc_decoder_select="mpegvideo_decoder"
 msmpeg4v1_encoder_select="aandct"
 msmpeg4v2_encoder_select="aandct"
 msmpeg4v3_encoder_select="aandct"

libavcodec/Makefile

@@ -140,7 +140,7 @@ OBJS-$(CONFIG_MP3ON4_DECODER)          += mpegaudiodec.o mpegaudiodecheader.o mp
 OBJS-$(CONFIG_MP3_DECODER)             += mpegaudiodec.o mpegaudiodecheader.o mpegaudio.o mpegaudiodata.o
 OBJS-$(CONFIG_MPC7_DECODER)            += mpc7.o mpc.o mpegaudiodec.o mpegaudiodecheader.o mpegaudio.o mpegaudiodata.o
 OBJS-$(CONFIG_MPC8_DECODER)            += mpc8.o mpc.o mpegaudiodec.o mpegaudiodecheader.o mpegaudio.o mpegaudiodata.o
-OBJS-$(CONFIG_MPEG_XVMC_DECODER)       += mpegvideo_xvmc.o mpeg12.o mpeg12data.o mpegvideo.o error_resilience.o
+OBJS-$(CONFIG_MPEG_XVMC_DECODER)       += mpegvideo_xvmc.o
 OBJS-$(CONFIG_MPEGVIDEO_DECODER)       += mpeg12.o mpeg12data.o mpegvideo.o error_resilience.o
 OBJS-$(CONFIG_MPEG1VIDEO_DECODER)      += mpeg12.o mpeg12data.o mpegvideo.o error_resilience.o
 OBJS-$(CONFIG_MPEG1VIDEO_ENCODER)      += mpeg12enc.o mpegvideo_enc.o motion_est.o ratecontrol.o mpeg12.o mpeg12data.o mpegvideo.o error_resilience.o