wire: derive message id from position

wire/wl_pointer.txt

@@ -1,73 +1,73 @@
 # requests
 
-request set_cursor = 0 {
+request set_cursor {
     serial: u32,
     surface: id(wl_surface),
     hotspot_x: i32,
     hotspot_y: i32,
 }
 
-request release = 1 {
+request release {
 
 }
 
 # events
 
-event enter = 0 {
+event enter {
     serial: u32,
     surface: id(wl_surface),
     surface_x: fixed,
     surface_y: fixed,
 }
 
-event leave = 1 {
+event leave {
     serial: u32,
     surface: id(wl_surface),
 }
 
-event motion = 2 {
+event motion {
     time: u32,
     surface_x: fixed,
     surface_y: fixed,
 }
 
-event button = 3 {
+event button {
     serial: u32,
     time: u32,
     button: u32,
     state: u32,
 }
 
-event axis = 4 {
+event axis {
     time: u32,
     axis: u32,
     value: fixed,
 }
 
-event frame = 5 {
+event frame {
 
 }
 
-event axis_source = 6 {
+event axis_source {
     axis_source: u32,
 }
 
-event axis_stop = 7 {
+event axis_stop {
     time: u32,
     axis: u32,
 }
 
-event axis_discrete = 8 {
+event axis_discrete {
     axis: u32,
     discrete: i32,
 }
 
-event axis_value120 = 9 {
+event axis_value120 {
     axis: u32,
     value120: i32,
 }
 
-event axis_relative_direction = 10 {
+event axis_relative_direction {
     axis: u32,
     direction: u32,
 }