discard warnings in readline 4.3

readline/display.c

@@ -70,7 +70,7 @@ static void insert_some_chars PARAMS((char *, int, int));
 static void cr PARAMS((void));
 
 #if defined (HANDLE_MULTIBYTE)
-static int _rl_col_width PARAMS((char *, int, int));
+static int _rl_col_width PARAMS((const char *, int, int));
 static int *_rl_wrapped_line;
 #else
 #  define _rl_col_width(l, s, e)	(((e) <= (s)) ? 0 : (e) - (s))
@@ -2118,7 +2118,7 @@ _rl_current_display_line ()
    scan from the beginning of the string to take the state into account. */
 static int
 _rl_col_width (str, start, end)
-     char *str;
+     const char *str;
      int start, end;
 {
   wchar_t wc;

readline/mbutil.c

@@ -196,7 +196,7 @@ _rl_find_prev_mbchar_internal (string, seed, find_non_zero)
    if it couldn't parse a complete  multibyte character.  */
 int
 _rl_get_char_len (src, ps)
-     char *src;
+     const char *src;
      mbstate_t *ps;
 {
   size_t tmp;
@@ -251,7 +251,7 @@ _rl_compare_chars (buf1, pos1, ps1, buf2, pos2, ps2)
    it returns -1 */
 int
 _rl_adjust_point(string, point, ps)
-     char *string;
+     const char *string;
      int point;
      mbstate_t *ps;
 {

readline/rlmbutil.h

@@ -82,8 +82,8 @@ extern int _rl_find_next_mbchar PARAMS((char *, int, int, int));
 #ifdef HANDLE_MULTIBYTE
 
 extern int _rl_compare_chars PARAMS((char *, int, mbstate_t *, char *, int, mbstate_t *));
-extern int _rl_get_char_len PARAMS((char *, mbstate_t *));
-extern int _rl_adjust_point PARAMS((char *, int, mbstate_t *));
+extern int _rl_get_char_len PARAMS((const char *, mbstate_t *));
+extern int _rl_adjust_point PARAMS((const char *, int, mbstate_t *));
 
 extern int _rl_read_mbchar PARAMS((char *, int));
 extern int _rl_read_mbstring PARAMS((int, char *, int));