Update ICU to 58.1

source/common/ucnvisci.c

Index: source/common/ucnvisci.c
diff --git a/source/common/ucnvisci.c b/source/common/ucnvisci.c
index d34d088f10618485b13e6fcc10ca4b2a1fc54191..b520fc244e30034510671298ef5916e36a30f4c2 100644
--- a/source/common/ucnvisci.c
+++ b/source/common/ucnvisci.c
@@ -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) 2000-2015, International Business Machines
+*   Copyright (C) 2000-2016, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 **********************************************************************
 *   file name:  ucnvisci.c
@@ -1284,7 +1286,7 @@ static void UConverter_toUnicode_ISCII_OFFSETS_LOGIC(UConverterToUnicodeArgs *ar
             /* look at the pre-context and perform special processing */
             switch (sourceChar) {
             case ISCII_INV:
-            case EXT: /*falls through*/
+            case EXT:
             case ATR:
                 *contextCharToUnicode = (UChar)sourceChar;
 
@@ -1322,7 +1324,6 @@ static void UConverter_toUnicode_ISCII_OFFSETS_LOGIC(UConverterToUnicodeArgs *ar
                 }
                 break;
             case 0x0A:
-                /* fall through */
             case 0x0D:
                 data->resetToDefaultToUnicode = TRUE;
                 GET_MAPPING(sourceChar,targetUniChar,data)
@@ -1334,7 +1335,7 @@ static void UConverter_toUnicode_ISCII_OFFSETS_LOGIC(UConverterToUnicodeArgs *ar
                 i=1;
                 found=FALSE;
                 for (; i<vowelSignESpecialCases[0][0]; i++) {
-                    U_ASSERT(i<sizeof(vowelSignESpecialCases)/sizeof(vowelSignESpecialCases[0]));
+                    U_ASSERT(i<UPRV_LENGTHOF(vowelSignESpecialCases));
                     if (vowelSignESpecialCases[i][0]==(uint8_t)*contextCharToUnicode) {
                         targetUniChar=vowelSignESpecialCases[i][1];
                         found=TRUE;
@@ -1420,6 +1421,7 @@ static void UConverter_toUnicode_ISCII_OFFSETS_LOGIC(UConverterToUnicodeArgs *ar
                         /* else fall through to default */
                     }
                     /* else fall through to default */
+                    U_FALLTHROUGH;
                 }
             default:GET_MAPPING(sourceChar,targetUniChar,data)
                 ;