Cosmetics after last commit

Originally committed as revision 18816 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/aac_ac3_parser.c

@@ -83,11 +83,9 @@ get_next:
             (avctx->codec_id == CODEC_ID_AC3 ||
              avctx->codec_id == CODEC_ID_EAC3)))) {
         avctx->channels = avctx->request_channels;
-    } else {
-        if (avctx->codec_id != CODEC_ID_AAC || s->channels) {
+    } else if (avctx->codec_id != CODEC_ID_AAC || s->channels) {
         avctx->channels = s->channels;
         avctx->channel_layout = s->channel_layout;
-        }
     }
     avctx->bit_rate = s->bit_rate;
     avctx->frame_size = s->samples;