mutt: fix signed/unsigned comparison in longest_common_prefix

[Brendan Cully]

changeset: 7101:952e4fcf1e2b
user:      Brendan Cully <bren...@kublai.com>
date:      Sat Jul 08 16:35:08 2017 -0700
link:      http://dev.mutt.org/hg/mutt/rev/952e4fcf1e2b

fix signed/unsigned comparison in longest_common_prefix

diffs (36 lines):

diff -r 428e36fb2262 -r 952e4fcf1e2b imap/imap.c
--- a/imap/imap.c       Wed Jul 05 19:09:51 2017 -0700
+++ b/imap/imap.c       Sat Jul 08 16:35:08 2017 -0700
@@ -1950,10 +1950,10 @@
 
 /* trim dest to the length of the longest prefix it shares with src,
  * returning the length of the trimmed string */
-static int
-longest_common_prefix (char *dest, const char* src, int start, size_t dlen)
+static size_t
+longest_common_prefix (char *dest, const char* src, size_t start, size_t dlen)
 {
-  int pos = start;
+  size_t pos = start;
 
   while (pos < dlen && dest[pos] && dest[pos] == src[pos])
     pos++;
@@ -1970,7 +1970,7 @@
   BUFFY* mailbox;
   CONNECTION* conn;
   int rc = -1;
-  int matchlen;
+  size_t matchlen;
 
   matchlen = mutt_strlen (dest);
   for (mailbox = Incoming; mailbox; mailbox = mailbox->next)
@@ -2023,7 +2023,8 @@
   char buf[LONG_STRING];
   IMAP_LIST listresp;
   char completion[LONG_STRING];
-  int clen, matchlen = 0;
+  int clen;
+  size_t matchlen = 0;
   int completions = 0;
   IMAP_MBOX mx;
   int rc;