[LyX/master] Fix comment in configure.ac. This was causing a warning during configuration.

[Richard Heck]

commit 34e3aa4ca25a58430edcfd4d05a2f700fc27519f
Author: Richard Heck <rgh...@lyx.org>
Date:   Tue Jun 11 11:05:31 2013 -0400

    Fix comment in configure.ac. This was causing a warning during
    configuration.

diff --git a/configure.ac b/configure.ac
index caa0b94..df1ba41 100644
--- a/configure.ac
+++ b/configure.ac
@@ -162,7 +162,7 @@ AC_TYPE_OFF_T
 AC_TYPE_PID_T
 AC_TYPE_SIZE_T
 AC_TYPE_UID_T
-// Taken from gettext
+# Taken from gettext
 AC_CACHE_CHECK([for wchar_t], [gt_cv_c_wchar_t],
    [AC_TRY_COMPILE([#include <stddef.h>
       wchar_t foo = (wchar_t)'\0';], ,