Update ICU to 54.1 step 1

source/i18n/chnsecal.cpp

Index: source/i18n/chnsecal.cpp
diff --git a/source/i18n/chnsecal.cpp b/source/i18n/chnsecal.cpp
index 893f9f6cacc24e8087527fc94755be09e819c983..5d6ded09a0f126db9cbb86c9325b42d31655cfaf 100644
--- a/source/i18n/chnsecal.cpp
+++ b/source/i18n/chnsecal.cpp
@@ -1,6 +1,6 @@
 /*
  ******************************************************************************
- * Copyright (C) 2007-2013, International Business Machines Corporation
+ * Copyright (C) 2007-2014, International Business Machines Corporation
  * and others. All Rights Reserved.
  ******************************************************************************
  *
@@ -49,10 +49,13 @@ static void debug_chnsecal_msg(const char *pat, ...)
 
 
 // --- The cache --
-static UMutex astroLock = U_MUTEX_INITIALIZER;  // pod bay door lock
+static UMutex astroLock = U_MUTEX_INITIALIZER;  // Protects access to gChineseCalendarAstro.
 static icu::CalendarAstronomer *gChineseCalendarAstro = NULL;
+
+// Lazy Creation & Access synchronized by class CalendarCache with a mutex.
 static icu::CalendarCache *gChineseCalendarWinterSolsticeCache = NULL;
 static icu::CalendarCache *gChineseCalendarNewYearCache = NULL;
+
 static icu::TimeZone *gChineseCalendarZoneAstroCalc = NULL;
 static icu::UInitOnce gChineseCalendarZoneAstroCalcInitOnce = U_INITONCE_INITIALIZER;