Correct length to use LOFF_T.

This is a part two, made in master, to the stable branch commit
11b18027.  These are mostly length adjustments to use LOFF_T, matching the
BODY->length type.

An argument could be made for size_t instead, and a few places in Mutt
do assign between those types.  I've used LOFF_T because off_t is a
signed integer.  Some changes in this commit affect loops that
decrement a length pointer while > 0.  Switching to a size_t could
create a wraparound infinite loop bug.

This also changes the Content-Length header parser to use atoll()
intead of atol().  I noticed from the man page that atol() doesn't
seem to return -1 on error.  But I've kept the check anyway.

1 files changed, 3 insertions, 2 deletions

diff --git a/edit.c b/edit.c
index b8f6b749..8bb8b636 100644
--- a/edit.c
+++ b/edit.c
@@ -63,7 +63,7 @@ static char* EditorHelp2 = N_("\
 
 static char **
 be_snarf_data (FILE *f, char **buf, int *bufmax, int *buflen, LOFF_T offset,
-	       int bytes, int prefix)
+	       LOFF_T bytes, int prefix)
 {
   char tmp[HUGE_STRING];
   char *p = tmp;
@@ -150,7 +150,8 @@ static char **
 be_include_messages (char *msg, char **buf, int *bufmax, int *buflen,
 		     int pfx, int inc_hdrs)
 {
-  int offset, bytes, n;
+  LOFF_T offset, bytes;
+  int n;
   char tmp[LONG_STRING];
 
   while ((msg = strtok (msg, " ,")) != NULL)