Check for duplicate const/static/inline.

Originally committed as revision 17101 to svn://svn.ffmpeg.org/ffmpeg/trunk

tools/patcheck

@@ -40,6 +40,7 @@ hiegrep2 '\b_[a-zA-Z0-9_]{1,}' '__(asm|attribute)([^a-zA-Z0-9]|$)' 'reserved ide
 hiegrep '//[-/<\* ]*$'    'empty comment' $*
 hiegrep '/\*[-<\* ]*\*/'  'empty comment' $*
 hiegrep 'for *\( *'"$ERE_PRITYP"' '  'not gcc 2.95 compatible' $*
+hiegrep '(static|inline|const) *\1'  'duplicate word' $*
 
 hiegrep2 '(int|unsigned|static|void)[a-zA-Z0-9 _]*(init|end)[a-zA-Z0-9 _]*\(.*[^;]$' '(av_cold|:\+[^a-zA-Z_])' 'These functions may need av_cold, please review the whole patch for similar functions needing av_cold' $*