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, 1 insertions, 1 deletions

diff --git a/mbox.c b/mbox.c
index 45380041..38c65c91 100644
--- a/mbox.c
+++ b/mbox.c
@@ -380,7 +380,7 @@ int mbox_parse_mailbox (CONTEXT *ctx)
 	   */
 	  if (curhdr->lines == 0)
 	  {
-	    int cl = curhdr->content->length;
+	    LOFF_T cl = curhdr->content->length;
 
 	    /* count the number of lines in this message */
 	    if (fseeko (ctx->fp, loc, SEEK_SET) != 0)