ICU 56 update step 1

source/i18n/windtfmt.cpp

Index: source/i18n/windtfmt.cpp
diff --git a/source/i18n/windtfmt.cpp b/source/i18n/windtfmt.cpp
index 1378491a60e562911a36546ca5c6dc479376d89e..9c9b57baf13e3098912fc69ecc9af7b0697db1ca 100644
--- a/source/i18n/windtfmt.cpp
+++ b/source/i18n/windtfmt.cpp
@@ -1,6 +1,6 @@
 /*
 ********************************************************************************
-*   Copyright (C) 2005-2013, International Business Machines
+*   Copyright (C) 2005-2014, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 ********************************************************************************
 *
@@ -124,7 +124,7 @@ Win32DateFormat &Win32DateFormat::operator=(const Win32DateFormat &other)
 
 //    delete fCalendar;
 
-    this->fDateTimeMsg = other.fDateTimeMsg;
+    this->fDateTimeMsg = other.fDateTimeMsg == NULL ? NULL : new UnicodeString(*other.fDateTimeMsg);
     this->fTimeStyle   = other.fTimeStyle;
     this->fDateStyle   = other.fDateStyle;
     this->fLocale      = other.fLocale;