feat(core): make message an empty string by default

shentao · shentao · commit cb7dc1d38f09 · 2020-08-08T12:54:15.000+02:00
diff --git a/packages/vuelidate/src/core.js b/packages/vuelidate/src/core.js
@@ -185,7 +185,7 @@ function createValidatorResult (rule, state, key, $dirty) {
           $model: model
         })
       ))
-    : message
+    : message || ''
 
   return {
     $message,
