Update ICU to 58.1

source/i18n/plurfmt.cpp

Index: source/i18n/plurfmt.cpp
diff --git a/source/i18n/plurfmt.cpp b/source/i18n/plurfmt.cpp
index 9ff2bffc9d99cae2984adcde81bb7473ae5e332e..8a000ce6e97bd934fa989588b5467fe7866a1ba0 100644
--- a/source/i18n/plurfmt.cpp
+++ b/source/i18n/plurfmt.cpp
@@ -1,3 +1,5 @@
+// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
 /*
 *******************************************************************************
 * Copyright (C) 2009-2015, International Business Machines Corporation and
@@ -216,14 +218,14 @@ PluralFormat::format(const Formattable& obj,
 
 UnicodeString
 PluralFormat::format(int32_t number, UErrorCode& status) const {
-    FieldPosition fpos(0);
+    FieldPosition fpos(FieldPosition::DONT_CARE);
     UnicodeString result;
     return format(Formattable(number), number, result, fpos, status);
 }
 
 UnicodeString
 PluralFormat::format(double number, UErrorCode& status) const {
-    FieldPosition fpos(0);
+    FieldPosition fpos(FieldPosition::DONT_CARE);
     UnicodeString result;
     return format(Formattable(number), number, result, fpos, status);
 }