[FFmpeg-devel] postprocess.c: replace check for p==NULL with *p==0

[Piotr Kaczuba]

It seems that the check for p==NULL in libpostproc/postprocess.c in the 
filter name replacement code is quite pointless as p can never be NULL. 
It should be probably *p==0 as the code wants to check for the end of 
the string. See attached patch.

-- 
Cheers,
Piotr
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