auth: Make auth_request_handler_unref(&NULL) no-op

diff --git a/src/auth/auth-request-handler.c b/src/auth/auth-request-handler.c
index 4f190cc35a968fbf13db5dba812cd2c9d3870cda..b5e89ad6e6ab169c855e962c4dc644aa0037ffc7 100644 (file)
--- a/src/auth/auth-request-handler.c
+++ b/src/auth/auth-request-handler.c
@@ -103,6 +103,8 @@ void auth_request_handler_unref(struct auth_request_handler **_handler)
 {
         struct auth_request_handler *handler = *_handler;
 
+       if (handler == NULL)
+               return;
        *_handler = NULL;
 
        i_assert(handler->refcount > 0);