Add timestamp to pointer image attach request

This lets the server discard requests received after the pointer has
exited and the re-entered a surface.

wayland/Makefile

@@ -49,7 +49,7 @@ scanner :					\
 
 scanner : LDLIBS += $(EXPAT_LIBS)
 
-install : $(libs) compositor
+install : $(libs)
 	install -d $(libdir) $(includedir) $(libdir)/pkgconfig
 	install wayland-server.pc wayland-client.pc $(libdir)/pkgconfig
 	install $(libs) $(libdir)

wayland/protocol.xml

@@ -213,6 +213,7 @@
 
   <interface name="input_device" version="1">
     <request name="attach">
+      <arg name="time" type="uint"/>
       <arg name="buffer" type="object" interface="buffer"/>
       <arg name="hotspot_x" type="int"/>
       <arg name="hotspot_y" type="int"/>