add parenthesis, fix warning: qtrleenc.c:257: warning: suggest parentheses around && within ||

Originally committed as revision 11685 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/qtrleenc.c

@@ -254,7 +254,7 @@ static int encode_frame(QtrleEncContext *s, AVFrame *p, uint8_t *buf)
 
     bytestream_put_be32(&buf, 0);                         // CHUNK SIZE, patched later
 
-    if (start_line == 0 && end_line == s->avctx->height || start_line == s->avctx->height)
+    if ((start_line == 0 && end_line == s->avctx->height) || start_line == s->avctx->height)
         bytestream_put_be16(&buf, 0);                     // header
     else {
         bytestream_put_be16(&buf, 8);                     // header