ICU 56 update step 1

source/common/unicode/utf8.h

 /*
 *******************************************************************************
 *
-*   Copyright (C) 1999-2014, International Business Machines
+*   Copyright (C) 1999-2015, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 *
 *******************************************************************************
 *   file name:  utf8.h
 *   encoding:   US-ASCII
 *   tab size:   8 (not used)
 *   indentation:4
 *
 *   created on: 1999sep13
 *   created by: Markus W. Scherer
@@ skipping 793 matching lines @@
  * The length can be negative for a NUL-terminated string.
  *
  * @param s const uint8_t * string
  * @param start int32_t starting string offset (usually 0)
  * @param i int32_t string offset, must be start<=i<=length
  * @param length int32_t string length
  * @see U8_SET_CP_LIMIT_UNSAFE
  * @stable ICU 2.4
  */
 #define U8_SET_CP_LIMIT(s, start, i, length) { \
-    if((start)<(i) && ((i)<(length) || ((length)<0 && (s)[i]!=0))) { \
+    if((start)<(i) && ((i)<(length) || (length)<0)) { \
         U8_BACK_1(s, start, i); \
         U8_FWD_1(s, i, length); \
     } \
 }
 
 #endif