compositor: Use wl_fixed_t for incoming input events

This changes notify_motion, notify_pointer_focus and notify_touch to take
wl_fixed_t types for input coordinates.
diff --git a/src/compositor-x11.c b/src/compositor-x11.c
index 759b551..7fbcb5f 100644
--- a/src/compositor-x11.c
+++ b/src/compositor-x11.c
@@ -560,6 +560,7 @@
 	xcb_atom_t atom;
 	uint32_t *k;
 	uint32_t i, set;
+	wl_fixed_t x, y;
 
 	prev = NULL;
 	while (x11_compositor_next_event(c, &event, mask)) {
@@ -633,10 +634,10 @@
 		case XCB_MOTION_NOTIFY:
 			motion_notify = (xcb_motion_notify_event_t *) event;
 			output = x11_compositor_find_output(c, motion_notify->event);
+			x = wl_fixed_from_int(output->base.x + motion_notify->event_x);
+			y = wl_fixed_from_int(output->base.y + motion_notify->event_y);
 			notify_motion(c->base.input_device,
-				      weston_compositor_get_time(),
-				      output->base.x + motion_notify->event_x,
-				      output->base.y + motion_notify->event_y);
+				      weston_compositor_get_time(), x, y);
 			break;
 
 		case XCB_EXPOSE:
@@ -651,10 +652,11 @@
 			if (enter_notify->state >= Button1Mask)
 				break;
 			output = x11_compositor_find_output(c, enter_notify->event);
+			x = wl_fixed_from_int(output->base.x + enter_notify->event_x);
+			y = wl_fixed_from_int(output->base.y + enter_notify->event_y);
+
 			notify_pointer_focus(c->base.input_device,
-					     &output->base,
-					     output->base.x + enter_notify->event_x,
-					     output->base.y + enter_notify->event_y);
+					     &output->base, x, y);
 			break;
 
 		case XCB_LEAVE_NOTIFY:
@@ -662,9 +664,7 @@
 			if (enter_notify->state >= Button1Mask)
 				break;
 			output = x11_compositor_find_output(c, enter_notify->event);
-			notify_pointer_focus(c->base.input_device, NULL,
-					     output->base.x + enter_notify->event_x,
-					     output->base.y + enter_notify->event_y);
+			notify_pointer_focus(c->base.input_device, NULL, 0, 0);
 			break;
 
 		case XCB_CLIENT_MESSAGE: