Update ICU to 58.1

source/i18n/gregocal.cpp

Index: source/i18n/gregocal.cpp
diff --git a/source/i18n/gregocal.cpp b/source/i18n/gregocal.cpp
index 5e98605bf92d8a59220a5d5588c62d4edbe6f9c2..11082223c7e1cef769916ee09e6d69428f924688 100644
--- a/source/i18n/gregocal.cpp
+++ b/source/i18n/gregocal.cpp
@@ -1,6 +1,8 @@
+// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
 /*
 *******************************************************************************
-* Copyright (C) 1997-2015, International Business Machines Corporation and
+* Copyright (C) 1997-2016, International Business Machines Corporation and
 * others. All Rights Reserved.
 *******************************************************************************
 *
@@ -850,6 +852,7 @@ GregorianCalendar::roll(UCalendarDateFields field, int32_t amount, UErrorCode& s
                         inCutoverMonth = TRUE;
                     }
             }
+            break;
         default:
             ;
         }