updated for version 7.4.475
Problem:    Can't compile on a system where Xutf8SetWMProperties() is not in
            the X11 library.  Issue 265.
Solution:   Add a configure check.
diff --git a/src/config.h.in b/src/config.h.in
index 7f16e62..b8168a5 100644
--- a/src/config.h.in
+++ b/src/config.h.in
@@ -446,3 +446,6 @@
 
 /* Define if we have AvailabilityMacros.h on Mac OS X */
 #undef HAVE_AVAILABILITYMACROS_H
+
+/* Define if Xutf8SetWMProperties() is in an X library. */
+#undef HAVE_XUTF8SETWMPROPERTIES