[PATCH] fix :reset to work with empty strings

[Aron Griffis]

As it turns out, mutt already handles all the option types
correctly except the string types: DT_STR, DT_PATH and DT_ADDR.
The following patch makes :reset work properly for all types,
tested with :reset all

# HG changeset patch
# User Aron Griffis <agrif...@n01se.net>
# Date 1248406601 14400
# Branch HEAD
# Node ID 1034d95a166a99316657b1ed83582a9be40b31fd
# Parent  1597c2074a5284c401a62ef52ed495d86bb09321
fix :reset to work with empty strings

Signed-off-by: Aron Griffis <agrif...@n01se.net>

diff -r 1597c2074a52 -r 1034d95a166a init.c
--- a/init.c    Thu Jul 23 17:28:02 2009 +0200
+++ b/init.c    Thu Jul 23 23:36:41 2009 -0400
@@ -1521,25 +1521,22 @@
   switch (p->type & DT_MASK)
   {
     case DT_STR:
-      if (p->init)
-       mutt_str_replace ((char **) p->data, (char *) p->init); 
+      mutt_str_replace ((char **) p->data, (char *) p->init); 
       break;
     case DT_PATH:
+      FREE((char **) p->data);
       if (p->init)
       {
        char path[_POSIX_PATH_MAX];
-
        strfcpy (path, (char *) p->init, sizeof (path));
        mutt_expand_path (path, sizeof (path));
-       mutt_str_replace ((char **) p->data, path);
+       *((char **) p->data) = safe_strdup (path);
       }
       break;
     case DT_ADDR:
+      rfc822_free_address ((ADDRESS **) p->data);
       if (p->init)
-      {
-       rfc822_free_address ((ADDRESS **) p->data);
        *((ADDRESS **) p->data) = rfc822_parse_adrlist (NULL, (char *) p->init);
-      }
       break;
     case DT_BOOL:
       if (p->init)