Fix null dereferencing issue for buttons

2018-01-02 23:18:54 -08:00
parent 609740dc48
commit eb11d7926c
2 changed files with 2 additions and 1 deletions
--- a/libs/core/buttons.ts
+++ b/libs/core/buttons.ts
@ -66,6 +66,7 @@ namespace brick {

        //% hidden
        _update(curr: boolean) {
+            if (curr === null) return
            if (this._isPressed == curr) return
            this._isPressed = curr
            if (curr) {