xwayland: fix three minor typos

Signed-off-by: Abdur Rehman <arehmanq199@gmail.com>
Reviewed-by: Yong Bakos <ybakos@humanoriented.com>
diff --git a/xwayland/window-manager.c b/xwayland/window-manager.c
index 56d65af..e7d5ee2 100644
--- a/xwayland/window-manager.c
+++ b/xwayland/window-manager.c
@@ -2196,7 +2196,7 @@
 			    32, /* format */
 			    1, &wm->wm_window);
 
-	/* Claim the WM_S0 selection even though we don't suport
+	/* Claim the WM_S0 selection even though we don't support
 	 * the --replace functionality. */
 	xcb_set_selection_owner(wm->conn,
 				wm->wm_window,