am 1ff4293e: Merge "Fixed race condition in Spinner.DialogPopup on null reference."

* commit '1ff4293e33f98e6dc19e4f154cb497af9bd88c9d':
  Fixed race condition in Spinner.DialogPopup on null reference.
diff --git a/core/java/android/widget/Spinner.java b/core/java/android/widget/Spinner.java
index b75d36f..5cbabef 100644
--- a/core/java/android/widget/Spinner.java
+++ b/core/java/android/widget/Spinner.java
@@ -952,8 +952,10 @@
         private CharSequence mPrompt;
 
         public void dismiss() {
-            mPopup.dismiss();
-            mPopup = null;
+            if (mPopup != null) {
+                mPopup.dismiss();
+                mPopup = null;
+            }
         }
 
         public boolean isShowing() {