Update ICU to 54.1 step 1

source/common/unistr.cpp

 /*
 ******************************************************************************
-* Copyright (C) 1999-2013, International Business Machines Corporation and
+* Copyright (C) 1999-2014, International Business Machines Corporation and
 * others. All Rights Reserved.
 ******************************************************************************
 *
 * File unistr.cpp
 *
 * Modification History:
 *
 *   Date        Name        Description
 *   09/25/98    stephen     Creation.
 *   04/20/99    stephen     Overhauled per 4/16 code review.
@@ skipping 438 matching lines @@
 }
 
 UnicodeString &
 UnicodeString::fastCopyFrom(const UnicodeString &src) {
   return copyFrom(src, TRUE);
 }
 
 UnicodeString &
 UnicodeString::copyFrom(const UnicodeString &src, UBool fastCopy) {
   // if assigning to ourselves, do nothing
-  if(this == 0 || this == &src) {
+  if(this == &src) {
     return *this;
   }
 
   // is the right side bogus?
-  if(&src == 0 || src.isBogus()) {
+  if(src.isBogus()) {
     setToBogus();
     return *this;
   }
 
   // delete the current contents
   releaseArray();
 
   if(src.isEmpty()) {
     // empty string - use the stack buffer
     setToEmpty();
@@ skipping 1338 matching lines @@
 This should never be called. It is defined here to make sure that the
 virtual vector deleting destructor is defined within unistr.cpp.
 The vector deleting destructor is already a part of UObject,
 but defining it here makes sure that it is included with this object file.
 This makes sure that static library dependencies are kept to a minimum.
 */
 static void uprv_UnicodeStringDummy(void) {
     delete [] (new UnicodeString[2]);
 }
 #endif