sh-quote: Improve shell_quote_argv's signature

[Bruno Haible]

A trivial API change, to avoid the need for const-casts.


2012-05-06  Bruno Haible  <address@hidden>

        sh-quote: Improve shell_quote_argv's signature.
        * lib/sh-quote.h (shell_quote_argv): Make argument array a 'const *'.
        * lib/sh-quote.c (shell_quote_argv): Likewise.

--- lib/sh-quote.h.orig Mon May  7 03:31:12 2012
+++ lib/sh-quote.h      Mon May  7 02:21:47 2012
@@ -33,4 +33,4 @@
 
 /* Returns a freshly allocated string containing all argument strings, quoted,
    separated through spaces.  */
-extern char * shell_quote_argv (char **argv);
+extern char * shell_quote_argv (char * const *argv);
--- lib/sh-quote.c.orig Mon May  7 03:31:11 2012
+++ lib/sh-quote.c      Mon May  7 03:13:19 2012
@@ -69,11 +69,11 @@
 /* Returns a freshly allocated string containing all argument strings, quoted,
    separated through spaces.  */
 char *
-shell_quote_argv (char **argv)
+shell_quote_argv (char * const *argv)
 {
   if (*argv != NULL)
     {
-      char **argp;
+      char * const *argp;
       size_t length;
       char *command;
       char *p;