Update ICU to 58.1

source/i18n/rulebasedcollator.cpp

Index: source/i18n/rulebasedcollator.cpp
diff --git a/source/i18n/rulebasedcollator.cpp b/source/i18n/rulebasedcollator.cpp
index 758c65769cc52efb3d051b7865ea082298c69a9c..4852667ada8079eeb3285493c99e8156fd8fa45f 100644
--- a/source/i18n/rulebasedcollator.cpp
+++ b/source/i18n/rulebasedcollator.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) 1996-2015, International Business Machines
@@ -1609,7 +1611,7 @@ RuleBasedCollator::isUnsafe(UChar32 c) const {
     return data->isUnsafeBackward(c, settings->isNumeric());
 }
 
-void
+void U_CALLCONV
 RuleBasedCollator::computeMaxExpansions(const CollationTailoring *t, UErrorCode &errorCode) {
     t->maxExpansions = CollationElementIterator::computeMaxExpansions(t->data, errorCode);
 }