[5951] oops, \relax not \thisisundefined for \ifx\csname

[karl]

Revision: 5951
          http://svn.sv.gnu.org/viewvc/?view=rev&root=texinfo&revision=5951
Author:   karl
Date:     2014-12-04 00:16:07 +0000 (Thu, 04 Dec 2014)
Log Message:
-----------
oops, \relax not \thisisundefined for \ifx\csname

Modified Paths:
--------------
    trunk/doc/texinfo.tex

Modified: trunk/doc/texinfo.tex
===================================================================
--- trunk/doc/texinfo.tex       2014-12-04 00:05:09 UTC (rev 5950)
+++ trunk/doc/texinfo.tex       2014-12-04 00:16:07 UTC (rev 5951)
@@ -3,7 +3,7 @@
 % Load plain if necessary, i.e., if running under initex.
 \expandafter\ifx\csname fmtname\endcsname\relax\input plain\fi
 %
-\def\texinfoversion{2014-12-03.15}
+\def\texinfoversion{2014-12-03.16}
 %
 % Copyright 1985, 1986, 1988, 1990, 1991, 1992, 1993, 1994, 1995,
 % 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
@@ -9301,7 +9301,7 @@
 
 % @U{xxxx} to produce U+xxxx, if we support it.
 \def\U#1{%
-  \expandafter\ifx\csname uni:#1\endcsname \thisisundefined
+  \expandafter\ifx\csname uni:#1\endcsname \relax
     \errhelp = \EMsimple       
     \errmessage{Unicode character U+#1 not supported, sorry}%
   \else