Use _X_DEPRECATED instead of 'deprecated' to fix a build error; this is more
correct than using __attribute__((deprecated)), as _X_DEPRECATED will be
#ifdef'd away if not using gcc.

diff --git a/xcb/src/xcbxlib.h b/xcb/src/xcbxlib.h
index 4ceb03e..cbee247 100644
--- a/xcb/src/xcbxlib.h
+++ b/xcb/src/xcbxlib.h
@@ -28,11 +28,12 @@
 #ifndef __XCBXLIB_H
 #define __XCBXLIB_H
 
+#include <X11/Xfuncproto.h>
 #include <pthread.h>
 #include "xcb.h"
 
 /* This function must be called with the IOLock held. */
-unsigned int XCBGetQueuedRequestRead(XCBConnection *c) deprecated;
+unsigned int XCBGetQueuedRequestRead(XCBConnection *c) _X_DEPRECATED;
 
 /* This function must be called with the IOLock held. */
 unsigned int XCBGetRequestSent(XCBConnection *c);