Monkey protection

       Bug: 6191709

Change-Id: I0bc16f7970bda6b3f5ae3b5d59e3fbdee09a4956

Author: Michael Kolb

core/java/android/webkit/WebViewClassic.java

@@ -9130,8 +9130,10 @@ public void onItemClick(AdapterView<?> parent, View v,
                         // after the page regains focus.
                         mListBoxMessage = Message.obtain(null,
                                 EventHub.SINGLE_LISTBOX_CHOICE, (int) id, 0);
-                        mListBoxDialog.dismiss();
-                        mListBoxDialog = null;
+                        if (mListBoxDialog != null) {
+                            mListBoxDialog.dismiss();
+                            mListBoxDialog = null;
+                        }
                     }
                 });
                 if (mSelection != -1) {