[FFmpeg-cvslog] 4xm: drop pointless assert

[Luca Barbato]

ffmpeg | branch: master | Luca Barbato <lu_zero at gentoo.org> | Thu Jun  6 14:21:19 2013 +0200| [1f0c6075604c271d5627480f1243d22795f9a315] | committer: Luca Barbato

4xm: drop pointless assert

Make sure the value of wlog2 is always between 0 and 3.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=1f0c6075604c271d5627480f1243d22795f9a315
---

 libavcodec/4xm.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/4xm.c b/libavcodec/4xm.c
index 4a293eb..1e70644 100644
--- a/libavcodec/4xm.c
+++ b/libavcodec/4xm.c
@@ -327,7 +327,7 @@ static inline void mcdc(uint16_t *dst, uint16_t *src, int log2w,
         }
         break;
     default:
-        assert(0);
+        break;
     }
 }
 
@@ -343,7 +343,7 @@ static int decode_p_block(FourXContext *f, uint16_t *dst, uint16_t *src,
     uint16_t *end   = start + stride * (f->avctx->height - h + 1) - (1 << log2w);
     int ret;
 
-    if (code < 0 || code > 6)
+    if (code < 0 || code > 6 || log2w < 0)
         return AVERROR_INVALIDDATA;
 
     if (code == 0) {