Rename frame_create and frame_set_child_size with a window_ prefix

This is to avoid a collision with an actual frame structure.

Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
diff --git a/clients/clickdot.c b/clients/clickdot.c
index aebe4db..c300fa5 100644
--- a/clients/clickdot.c
+++ b/clients/clickdot.c
@@ -249,7 +249,7 @@
 
 	clickdot = xzalloc(sizeof *clickdot);
 	clickdot->window = window_create(display);
-	clickdot->widget = frame_create(clickdot->window, clickdot);
+	clickdot->widget = window_frame_create(clickdot->window, clickdot);
 	window_set_title(clickdot->window, "Wayland ClickDot");
 	clickdot->display = display;
 	clickdot->buffer = NULL;