Fixing NPE caused by an unsupported date format.

Bug: 3291968
Change-Id: Ia6baf689228a6b35448ba44197144b743444f1a5
diff --git a/src/com/android/contacts/util/DialogManager.java b/src/com/android/contacts/util/DialogManager.java
index f1bae0f..661c5d3 100644
--- a/src/com/android/contacts/util/DialogManager.java
+++ b/src/com/android/contacts/util/DialogManager.java
@@ -99,6 +99,9 @@
             return null;
         }
         final Dialog dialog = ((DialogShowingView)view).createDialog(bundle);
+        if (dialog == null) {
+            return dialog;
+        }
 
         // As we will never re-use this dialog, we can completely kill it here
         dialog.setOnDismissListener(new OnDismissListener() {