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avcodec/pnm: check buf[0] before using buf[1] 

Fixes CSA warning
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-08-03 14:01:03 +02:00
parent 4fed019821
commit b4d525eb63
1 changed files with 1 additions and 1 deletions
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2
libavcodec/pnm.c
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@ -63,9 +63,9 @@ int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s)
int h, w, depth, maxval;
pnm_get(s, buf1, sizeof(buf1));
s->type= buf1[1]-'0';
if(buf1[0] != 'P')
return AVERROR_INVALIDDATA;
s->type= buf1[1]-'0';
if (s->type==1 || s->type==4) {
avctx->pix_fmt = AV_PIX_FMT_MONOWHITE;