[patch] fix signed comparison warnings in string/strchr.c

[Mike Frysinger <vapier at gentoo dot org>]

building string/strchr.c with gcc-4.x yields signed comparison warnings ... 
this patch adds a cast to silence said warning
-mike

2006-05-15  Mike Frysinger  <vapier@gentoo.org>

	* string/strchr.c: Add cast to avoid warning.

--- string/strchr.c
+++ string/strchr.c
@@ -42,8 +42,8 @@ strchr (s, c_in)
 
   /* Handle the first few characters by reading one character at a time.
      Do this until CHAR_PTR is aligned on a longword boundary.  */
-  for (char_ptr = s; ((unsigned long int) char_ptr
-		      & (sizeof (longword) - 1)) != 0;
+  for (char_ptr = (const unsigned char *) s;
+       ((unsigned long int) char_ptr & (sizeof (longword) - 1)) != 0;
        ++char_ptr)
     if (*char_ptr == c)
       return (void *) char_ptr;

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