silence wmaenc.c:181: warning:suggestparentheses around assignment used as truth value

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@11940 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/wmaenc.c

@@ -178,7 +178,7 @@ static int encode_block(WMACodecContext *s, float (*src_coefs)[BLOCK_MAX_SIZE],
     }
 
     for(ch = 0; ch < s->nb_channels; ch++) {
-        if (s->channel_coded[ch]= 1) { //FIXME only set channel_coded when needed, instead of always
+        if ((s->channel_coded[ch]= 1)) { //FIXME only set channel_coded when needed, instead of always
             init_exp(s, ch, fixed_exp);
         }
     }