sync code with last improvements from OpenBSD

lib/libXext/include/X11/extensions/XLbx.h

@@ -0,0 +1,50 @@
+/*
+ * Copyright 1992 Network Computing Devices
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of NCD. not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  NCD. makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as is"
+ * without express or implied warranty.
+ *
+ * NCD. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL NCD.
+ * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#ifndef _XLBX_H_
+#define _XLBX_H_
+
+#include <X11/Xfuncproto.h>
+#include <X11/Xdefs.h>
+#include <X11/Xlib.h>
+#include <X11/extensions/lbx.h>
+
+_XFUNCPROTOBEGIN
+
+Bool XLbxQueryExtension(
+    Display*		/* dpy */,
+    int*		/* requestp */,
+    int*		/* event_basep */,
+    int*		/* error_basep */
+);
+
+Bool XLbxQueryVersion(
+    Display*		/* dpy */,
+    int*		/* majorVersion */,
+    int*		/* minorVersion */
+);
+
+int XLbxGetEventBase(Display *dpy);
+
+_XFUNCPROTOEND
+
+#endif