list-keywords: fix when not using default install

As we don't parse the YAML file when listing of keywords is asked,
suricata make a test on existence of the build-default directory.
So with a non standard (working) install (even a single configure
without option lead to a failure), the keyword listing fails
because the default logging directory does not exist.

src/suricata.c

@@ -1315,6 +1315,8 @@ int main(int argc, char **argv)
         log_dir = DEFAULT_LOG_DIR;
 #endif /* OS_WIN32 */
     }
+
+    if (!list_keywords && !list_app_layer_protocols) {
 #ifdef OS_WIN32
         if (_stat(log_dir, &buf) != 0) {
 #else
@@ -1325,6 +1327,7 @@ int main(int argc, char **argv)
                         "Shutting down the engine", log_dir, conf_filename);
             exit(EXIT_FAILURE);
         }
+    }
 
     /* Pull the max pending packets from the config, if not found fall
      * back on a sane default. */