FYI: 29-gary-fix-signedness-mismatch-warnings

[Gary V. Vaughan]

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Applied to HEAD.

  Index: ChangeLog
  from  Gary V. Vaughan  <address@hidden>
        Get rid of the last 'differs in signedness' compiler warnings:
  
        * m4/macro.c (process_macro): m4_get_symbol_value_text() returns
        a regular 'char *', so variables to store the return address,
        and iterate through it should be regular 'char *' too.
        * m4/input.c (m4_input_block): The start and current members of
        the string part of this union store regular 'char *' types, so
        they should be regular 'char *' types too.
  
  Index: m4/input.c
  ===================================================================
  RCS file: /sources/m4/m4/m4/input.c,v
  retrieving revision 1.63
  diff -u -u -r1.63 input.c
  --- m4/input.c 2 Apr 2007 12:06:23 -0000 1.63
  +++ m4/input.c 2 Apr 2007 12:27:41 -0000
  @@ -146,8 +146,8 @@
       {
         struct
        {
  -       unsigned char *start;         /* string value */
  -       unsigned char *current;       /* current value */
  +       char *start;          /* string value */
  +       char *current;        /* current value */
        }
         u_s;
         struct
  Index: m4/macro.c
  ===================================================================
  RCS file: /sources/m4/m4/m4/macro.c,v
  retrieving revision 1.64
  diff -u -u -r1.64 macro.c
  --- m4/macro.c 11 Nov 2006 16:21:25 -0000 1.64
  +++ m4/macro.c 2 Apr 2007 12:27:41 -0000
  @@ -415,7 +415,7 @@
   process_macro (m4 *context, m4_symbol_value *value, m4_obstack *obs,
               int argc, m4_symbol_value **argv)
   {
  -  const unsigned char *text;
  +  const char *text;
     int i;
   
     for (text = m4_get_symbol_value_text (value); *text != '\0';)
  @@ -471,7 +471,7 @@
          else
            {
              size_t len  = 0;
  -           const unsigned char *endp;
  +           const char *endp;
              const char *key;
   
              for (endp = ++text;
- -- 
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