add zero termination for utf16

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76849 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

tests/strings/unicode.cpp

@@ -393,7 +393,7 @@ void UnicodeTestCase::ConversionUTF16()
 
     // Another one: verify that the length of the resulting string is computed
     // correctly when there is a surrogate in the input.
-    wxMBConvUTF16BE().cMB2WC("\xd8\x03\xdc\x01" /* OLD TURKIC LETTER YENISEI A */, wxNO_LEN, &len);
+    wxMBConvUTF16BE().cMB2WC("\xd8\x03\xdc\x01\0" /* OLD TURKIC LETTER YENISEI A */, wxNO_LEN, &len);
     CPPUNIT_ASSERT_EQUAL( 1, len );
 }