Update ICU to 54.1 step 1

source/common/uvectr64.h

Index: source/common/uvectr64.h
diff --git a/source/common/uvectr64.h b/source/common/uvectr64.h
index 05cbc35ec3ea112c08c249a79a4633f5a63b0014..0692821e5685ebf30389619ecb4e5a499dca0447 100644
--- a/source/common/uvectr64.h
+++ b/source/common/uvectr64.h
@@ -1,6 +1,6 @@
 /*
 **********************************************************************
-*   Copyright (C) 1999-2010, International Business Machines
+*   Copyright (C) 1999-2014, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 **********************************************************************
 */
@@ -122,7 +122,7 @@ public:
 
     int32_t size(void) const;
 
-    //UBool isEmpty(void) const;
+    inline UBool isEmpty(void) const { return count == 0; }
 
     // Inline.  Use this one for speedy size check.
     inline UBool ensureCapacity(int32_t minimumCapacity, UErrorCode &status);