10l, forgot to replace a / 256 for r14173.

Fixes MS ADPCM regression test.

Originally committed as revision 14174 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/adpcm.c

@@ -732,7 +732,7 @@ static inline short adpcm_ms_expand_nibble(ADPCMChannelStatus *c, char nibble)
 {
     int predictor;
 
-    predictor = (((c->sample1) * (c->coeff1)) + ((c->sample2) * (c->coeff2))) / 256;
+    predictor = (((c->sample1) * (c->coeff1)) + ((c->sample2) * (c->coeff2))) / 64;
     predictor += (signed)((nibble & 0x08)?(nibble - 0x10):(nibble)) * c->idelta;
 
     c->sample2 = c->sample1;