show an error message for invalid parameter

src/http/ngx_http_core_module.c

diff --git a/src/http/ngx_http_core_module.c b/src/http/ngx_http_core_module.c
index f7b8b5b..20aba86 100644
--- a/src/http/ngx_http_core_module.c
+++ b/src/http/ngx_http_core_module.c
@@ -3499,7 +3499,7 @@
 
             max = ngx_atoi(value[i].data + 4, value[i].len - 4);
             if (max == NGX_ERROR) {
-                return NGX_CONF_ERROR;
+                goto failed;
             }
 
             continue;
@@ -3512,7 +3512,7 @@
 
             inactive = ngx_parse_time(&s, 1);
             if (inactive < 0) {
-                return NGX_CONF_ERROR;
+                goto failed;
             }
 
             continue;
@@ -3525,6 +3525,8 @@
             continue;
         }
 
+    failed:
+
         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                            "invalid \"open_file_cache\" parameter \"%V\"",
                            &value[i]);