updated for version 7.4.558

Problem:    When the X server restarts Vim may get stuck.
Solution:   Destroy the application context and create it again.  (Issue 203)

src/os_unix.c

@@ -1617,6 +1617,17 @@ may_restore_clipboard()
     if (xterm_dpy_was_reset)
     {
 	xterm_dpy_was_reset = FALSE;
+
+# ifndef LESSTIF_VERSION
+	/* This has been reported to avoid Vim getting stuck. */
+	if (app_context != (XtAppContext)NULL)
+	{
+	    XtDestroyApplicationContext(app_context);
+	    app_context = (XtAppContext)NULL;
+	    x11_display = NULL; /* freed by XtDestroyApplicationContext() */
+	}
+# endif
+
 	setup_term_clip();
 	get_x11_title(FALSE);
     }