Fixed logging with variable field width.
diff --git a/src/core/ngx_resolver.c b/src/core/ngx_resolver.c
index 38bf956..3c52de8 100644
--- a/src/core/ngx_resolver.c
+++ b/src/core/ngx_resolver.c
@@ -1873,7 +1873,7 @@
     ngx_log_error(r->log_level, r->log, 0,
                   "DNS error (%ui: %s), query id:%ui, name:\"%*s\"",
                   code, ngx_resolver_strerror(code), ident,
-                  rn->nlen, rn->name);
+                  (size_t) rn->nlen, rn->name);
     return;
 
 dns_error: