Fix UTF-16 surrogate handling in wctomb and friends.

* libc/stdlib/wctomb_r.c (__utf8_wctomb): Fix check for handling a
	lone high surrogate.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

newlib/ChangeLog

@@ -1,3 +1,8 @@
+2015-04-01  Corinna Vinschen  <vinschen@redhat.com>
+
+	* libc/stdlib/wctomb_r.c (__utf8_wctomb): Fix check for handling a
+	lone high surrogate.
+
 2015-03-31  Corinna Vinschen  <vinschen@redhat.com>
 
 	* libc/time/lcltime_r.c (localtime_r): Call _tzset_unlocked inside

newlib/libc/stdlib/wctomb_r.c

@@ -74,7 +74,7 @@ _DEFUN (__utf8_wctomb, (r, s, wchar, charset, state),
     return 0; /* UTF-8 encoding is not state-dependent */
 
   if (sizeof (wchar_t) == 2 && state->__count == -4
-      && (wchar < 0xdc00 || wchar >= 0xdfff))
+      && (wchar < 0xdc00 || wchar > 0xdfff))
     {
       /* There's a leftover lone high surrogate.  Write out the CESU-8 value
 	 of the surrogate and proceed to convert the given character.  Note

winsup/cygwin/release/1.7.36

@@ -35,3 +35,6 @@ Bug Fixes
 
 - Avoid potential crash at startup or in getgroups(2).
   Addresses: https://cygwin.com/ml/cygwin/2015-04/msg00010.html
+
+- Fix UTF-16 surrogate handling in wctomb and friends.
+  Addresses: https://cygwin.com/ml/cygwin/2015-03/msg00452.html