fix a crash in SVQ1 with cmp!=sad

Originally committed as revision 19625 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/svq1enc.c

@@ -499,6 +499,7 @@ static av_cold int svq1_encode_init(AVCodecContext *avctx)
 
     s->avctx= avctx;
     s->m.avctx= avctx;
+    s->m.me.temp      =
     s->m.me.scratchpad= av_mallocz((avctx->width+64)*2*16*2*sizeof(uint8_t));
     s->m.me.map       = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
     s->m.me.score_map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));