Simplify: remove pointless {} and else

Originally committed as revision 20129 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/raw.c

@@ -171,11 +171,9 @@ static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
     pkt->dts= pkt->pos / packet_size;
 
     pkt->stream_index = 0;
-    if (ret != packet_size) {
+    if (ret != packet_size)
         return AVERROR(EIO);
-    } else {
-        return 0;
-    }
+    return 0;
 }
 #endif