Fixed segmentation fault in ngx_resolver_create_name_query(). If name passed for resolution was { 0, NULL } (e.g. as a result of name server returning CNAME pointing to ".") pointer wrapped to (void *) -1 resulting in segmentation fault on an attempt to dereference it. Reported by Lanshun Zhou.

# Copyright (C) Igor Sysoev
# Copyright (C) Nginx, Inc.


# aCC: HP ANSI C++ B3910B A.03.55.02

# C89 mode

CFLAGS="$CFLAGS -Ae"
CC_TEST_FLAGS="-Ae"

PCRE_OPT="$PCRE_OPT -Ae"
ZLIB_OPT="$ZLIB_OPT -Ae"
MD5_OPT="$MD5_OPT -Ae"