Take care of two Clang warnings.

source/i18n/colldata.cpp

 /*
  ******************************************************************************
  *   Copyright (C) 1996-2009, International Business Machines                 *
  *   Corporation and others.  All Rights Reserved.                            *
  ******************************************************************************
  */
 
 #include "unicode/utypes.h"
 
 #if !UCONFIG_NO_COLLATION
@@ skipping 218 matching lines @@
     }
 
 #ifdef INSTRUMENT_STRING_LIST
     _strings += 1;
 #endif
 
     if (listSize >= listMax) {
         int32_t newMax = listMax + STRING_LIST_BUFFER_SIZE;
 
         UnicodeString *newStrings = new UnicodeString[newMax];
-
-        uprv_memcpy(newStrings, strings, listSize * sizeof(UnicodeString));
+        if (newStrings == NULL) {
+            status = U_MEMORY_ALLOCATION_ERROR;
+            return;
+        }
+        for (int32_t i=0; i<listSize; ++i) {
+            newStrings[i] = strings[i];
+        }
 
 #ifdef INSTRUMENT_STRING_LIST
         int32_t _h = listSize / STRING_LIST_BUFFER_SIZE;
 
         if (_h > 100) {
             _h = 100;
         }
 
         _histogram[_h] += 1;
 #endif
@@ skipping 840 matching lines @@
     // **** this will fail if the another ****
     // **** thread deletes the cache here ****
     if (cache != NULL) {
         cache->flush();
     }
 }
 
 U_NAMESPACE_END
 
 #endif // #if !UCONFIG_NO_COLLATION