Implemented GetLastInputInfo.

diff --git a/server/request.h b/server/request.h
index 49228dc..8a6ac16 100644
--- a/server/request.h
+++ b/server/request.h
@@ -266,6 +266,7 @@
 DECL_HANDLER(get_window_properties);
 DECL_HANDLER(attach_thread_input);
 DECL_HANDLER(get_thread_input);
+DECL_HANDLER(get_last_input_time);
 DECL_HANDLER(get_key_state);
 DECL_HANDLER(set_key_state);
 DECL_HANDLER(set_foreground_window);
@@ -461,6 +462,7 @@
     (req_handler)req_get_window_properties,
     (req_handler)req_attach_thread_input,
     (req_handler)req_get_thread_input,
+    (req_handler)req_get_last_input_time,
     (req_handler)req_get_key_state,
     (req_handler)req_set_key_state,
     (req_handler)req_set_foreground_window,