patcheck: warn about assert usage

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

tools/patcheck

@@ -82,6 +82,7 @@ hiegrep '(:\+|,|;)( *|static|\*)*'"$ERE_PRITYP"' *\*( |\*)*(src|source|input|in[
 hiegrep '(:\+|,|;)( *|static|\*)*'"$ERE_PRITYP"' *(src|source|input|in)([0-9A-Z_][0-9A-Za-z_]*){1,} *\[' 'missing const (test2)?' $*
 hiegrep ' *static *'"$ERE_FUNCS"'[^)]*\);' 'static prototype, maybe you should reorder your functions' $*
 hiegrep '@file: *[a-zA-Z0-9_]' 'doxy filetag with filename can in the future cause problems when forgotten during a rename' $*
+hiegrep '\bassert' 'Please use av_assert0, av_assert1 or av_assert2' $*
 
 hiegrep2 '\.long_name *=' 'NULL_IF_CONFIG_SMAL' 'missing NULL_IF_CONFIG_SMAL' $*
 hiegrep2 '\.pix_fmts *= *\(' 'const' 'missing const for pix_fmts array' $*