Fix a signed comparison error in nsurl parsing.

In utils/nsurl.c the function nsurl__create_from_section() has a
section dealing with non-redundant ports (starting line 973).

lwc_intern_string() was being called with negative lengths and as it
takes a size_t (unsigned) so is getting passed a very large length
which causes a segfault.

this is supposed to be protected by the flag setting on line 969
however the arithmetic is all *unsigned* so the condition never
matches

(gdb) p length - (colon - pegs->at + skip)
$9 = 18446744073709551608

changing the check arithmetic to be a simple comparison against length
prevents this issue and reduces the amount of computation required.

0 files changed, 0 insertions, 0 deletions