window: rename enum pointer_type to cursor_type

This avoids confusion with the pointer devices (struct wl_pointer).
diff --git a/clients/smoke.c b/clients/smoke.c
index d730124..69d4f23 100644
--- a/clients/smoke.c
+++ b/clients/smoke.c
@@ -258,7 +258,7 @@
 			smoke->b[0].d[k] += 1;
 		}
 
-	return POINTER_HAND1;
+	return CURSOR_HAND1;
 }
 
 static void