Take care of two Clang warnings.

source/i18n/colldata.cpp

Index: source/i18n/colldata.cpp
===================================================================
--- source/i18n/colldata.cpp	(revision 122360)
+++ source/i18n/colldata.cpp	(working copy)
@@ -236,9 +236,14 @@
         int32_t newMax = listMax + STRING_LIST_BUFFER_SIZE;
 
         UnicodeString *newStrings = new UnicodeString[newMax];
+        if (newStrings == NULL) {
+            status = U_MEMORY_ALLOCATION_ERROR;
+            return;
+        }
+        for (int32_t i=0; i<listSize; ++i) {
+            newStrings[i] = strings[i];
+        }
 
-        uprv_memcpy(newStrings, strings, listSize * sizeof(UnicodeString));
-
 #ifdef INSTRUMENT_STRING_LIST
         int32_t _h = listSize / STRING_LIST_BUFFER_SIZE;