Make ICU C++ 11 compliant on Windows

source/i18n/winnmfmt.cpp

 /*
 ********************************************************************************
 *   Copyright (C) 2005-2013, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 ********************************************************************************
 *
 * File WINNMFMT.CPP
 *
 ********************************************************************************
 */
@@ skipping 224 matching lines @@
     fFractionDigitsSet = TRUE;
     NumberFormat::setMaximumFractionDigits(newValue);
 }
 
 void Win32NumberFormat::setMinimumFractionDigits(int32_t newValue)
 {
     fFractionDigitsSet = TRUE;
     NumberFormat::setMinimumFractionDigits(newValue);
 }
 
-UnicodeString &Win32NumberFormat::format(int32_t numDigits, UnicodeString &appendTo, wchar_t *fmt, ...) const
+UnicodeString &Win32NumberFormat::format(int32_t numDigits, UnicodeString &appendTo, const wchar_t *fmt, ...) const
 {
     wchar_t nStackBuffer[STACK_BUFFER_SIZE];
     wchar_t *nBuffer = nStackBuffer;
     va_list args;
     int result;
 
     nBuffer[0] = 0x0000;
 
     /* Due to the arguments causing a result to be <= 23 characters (+2 for NULL and minus),
     we don't need to reallocate the buffer. */
@@ skipping 96 matching lines @@
     }*/
 
     return appendTo;
 }
 
 U_NAMESPACE_END
 
 #endif /* #if !UCONFIG_NO_FORMATTING */
 
 #endif // U_PLATFORM_USES_ONLY_WIN32_API