ICU 56 step 4: Apply post-56 fixes for measure/date format

source/i18n/reldatefmt.cpp

 /*
 ******************************************************************************
-* Copyright (C) 2014, International Business Machines Corporation and         
-* others. All Rights Reserved.                                                
+* Copyright (C) 2014-2015, International Business Machines Corporation and
+* others. All Rights Reserved.
 ******************************************************************************
-*                                                                             
-* File RELDATEFMT.CPP                                                             
+*
+* File reldatefmt.cpp
 ******************************************************************************
 */
 
 #include "unicode/reldatefmt.h"
 
 #if !UCONFIG_NO_FORMATTING && !UCONFIG_NO_BREAK_ITERATION
 
 #include "unicode/localpointer.h"
 #include "quantityformatter.h"
 #include "unicode/plurrule.h"
@@ skipping 161 matching lines @@
     for (int32_t i = 0; i < size; ++i) {
         LocalUResourceBundlePointer pluralBundle(
                 ures_getByIndex(resource, i, NULL, &status));
         if (U_FAILURE(status)) {
             return;
         }
         UnicodeString rawPattern;
         if (!getString(pluralBundle.getAlias(), rawPattern, status)) {
             return;
         }
-        if (!formatter.add(
+        if (!formatter.addIfAbsent(
                 ures_getKey(pluralBundle.getAlias()),
                 rawPattern,
                 status)) {
             return;
         }
     }
 }
 
 static void initRelativeUnit(
         const UResourceBundle *resource,
@@ skipping 692 matching lines @@
         bi.orphan();
         SharedObject::copyPtr(shared, fOptBreakIterator);
     }
 }
 
 
 U_NAMESPACE_END
 
 #endif /* !UCONFIG_NO_FORMATTING */