Fixed null problem (#162)

Closes #157

src/config-serializer/config-items/Module.ts

@@ -50,7 +50,11 @@ export class Module extends Serializable<Module> {
         return {
             id: this.id,
             pointerRole: PointerRole[this.pointerRole],
-            keyActions: this.keyActions.map(keyAction => keyAction.toJsObject())
+            keyActions: this.keyActions.map(keyAction => {
+                if (keyAction) {
+                    return keyAction.toJsObject();
+                }
+            })
         };
     }
 

src/config-serializer/config-items/key-action/helper.ts

@@ -66,6 +66,10 @@ export class Helper {
     }
 
     private static fromJSONObject(keyAction: any): KeyAction {
+        if (!keyAction) {
+            return;
+        }
+
         switch (keyAction.keyActionType) {
             case keyActionType.NoneAction:
                 return new NoneAction().fromJsObject(keyAction);