From 8219782a6da9e203f6a4e31dddc7888133a5c5f6 Mon Sep 17 00:00:00 2001
From: Carl Eugen Hoyos <cehoyos@rainbow.studorg.tuwien.ac.at>
Date: Mon, 10 Jan 2011 22:09:52 +0000
Subject: [PATCH] Do not stop decoding on pnm files with negative maxval.

Originally committed as revision 26304 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/pnm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/pnm.c b/libavcodec/pnm.c
index 43438b7cef..c104e23427 100644
--- a/libavcodec/pnm.c
+++ b/libavcodec/pnm.c
@@ -142,7 +142,7 @@ int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s)
         s->maxval = atoi(buf1);
         if (s->maxval <= 0) {
             av_log(avctx, AV_LOG_ERROR, "Invalid maxval: %d\n", s->maxval);
-            return -1;
+            s->maxval = 255;
         }
         if (s->maxval >= 256) {
             if (avctx->pix_fmt == PIX_FMT_GRAY8) {