Map: fixed optimization of variables as values. Previous code incorrectly used ctx->var_values as an array of pointers to ngx_http_variable_value_t, but the array contains structures, not pointers. Additionally, ctx->var_values inspection failed to properly set var on match.

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


have=NGX_SUPPRESS_WARN . auto/have

have=NGX_SMP . auto/have