Update ICU to 58.1

source/common/umutex.cpp

Index: source/common/umutex.cpp
diff --git a/source/common/umutex.cpp b/source/common/umutex.cpp
index 69eab79ff94508008cb1f056d0063b9026d4c387..90c7c019d23a388bc8a22b09d50d241c908f272a 100644
--- a/source/common/umutex.cpp
+++ b/source/common/umutex.cpp
@@ -1,7 +1,9 @@
+// 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
+*   Copyright (C) 1997-2016, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 *
 ******************************************************************************
@@ -68,10 +70,8 @@ U_NAMESPACE_BEGIN
 U_COMMON_API UBool U_EXPORT2 umtx_initImplPreInit(UInitOnce &uio) {
     for (;;) {
         int32_t previousState = InterlockedCompareExchange(
-#if (U_PLATFORM == U_PF_MINGW) || (U_PLATFORM == U_PF_CYGWIN) || defined(__clang__)
-           (LONG volatile *) // this is the type given in the API doc for this function.
-#endif
-            &uio.fState,  //  Destination
+            (LONG volatile *) // this is the type given in the API doc for this function.
+                &uio.fState,  //  Destination
             1,            //  Exchange Value
             0);           //  Compare value