[gnome-commander/ConvertWarningsToErrors] gnome-cmd-advrename-lexer.ll: yet another disgarding of warning from flex output

[Uwe Scholz <uwescholz src gnome org>]

commit eb5165a5c8404b81a9034cebc3d607b9e6a2042d
Author: Mamoru TASAKA <mtasaka fedoraproject org>
Date:   Wed Apr 19 23:13:58 2017 +0900

    gnome-cmd-advrename-lexer.ll: yet another disgarding of warning from flex output
    
    There are other warnings against the output from flex which cannot
    be fixed in gnome-commander side:
    
    gnome-cmd-advrename-lexer.cc:1884:17: error: comparison between signed and unsigned integer expressions 
[-Werror=sign-compare]
      for ( i = 0; i < _yybytes_len; ++i )

 src/gnome-cmd-advrename-lexer.ll |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/gnome-cmd-advrename-lexer.ll b/src/gnome-cmd-advrename-lexer.ll
index dfe39d2..ffb45bd 100644
--- a/src/gnome-cmd-advrename-lexer.ll
+++ b/src/gnome-cmd-advrename-lexer.ll
@@ -319,6 +319,7 @@ tag_name    {ape}|{audio}|{doc}|{exif}|{file}|{flac}|{id3}|{image}|{iptc}|{pdf}|
 #if defined (__GNUC__)
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wswitch-default"
+#pragma GCC diagnostic ignored "-Wsign-compare"
 #endif
 %}
 [^%$]+                          ECHO;                                      // concatenate consecutive 
non-[%$] chars into single TEXT chunk