aasc: fix output for msrle compression.

The bottom line was invalid before.

CC:libav-stable@libav.org
(cherry picked from commit da7baaaae7)

Conflicts:

	cmdutils.c

cmdutils.c

@@ -1566,7 +1566,7 @@ static int alloc_buffer(FrameBuffer **pool, AVCodecContext *s, FrameBuffer **pbu
     /* XXX this shouldn't be needed, but some tests break without this line
      * those decoders are buggy and need to be fixed.
      * the following tests fail:
-     * cdgraphics, ansi, aasc, qtrle-1bit
+     * cdgraphics, ansi, qtrle-1bit
      */
     memset(buf->base[0], 128, ret);