glob: fix heap buffer overflow * lib/glob.c (glob): Fix off-by-one error introduced into glibc in commit dd7d45e838a42b0ed470c44b55901ea98d0c2bab dated 1997-10-29 20:33:40. Problem reported by Tim Rühsen in: https://sourceware.org/bugzilla/show_bug.cgi?id=22320 Fix suggested by Bruno Haible.