malloc + memset -> zalloc

And for clients using the xmalloc helper, use xzalloc.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
diff --git a/clients/keyboard.c b/clients/keyboard.c
index 5fe5d9d..9c5cbc5 100644
--- a/clients/keyboard.c
+++ b/clients/keyboard.c
@@ -836,9 +836,7 @@
 
 	layout = get_current_layout(virtual_keyboard);
 
-	keyboard = xmalloc(sizeof *keyboard);
-	memset(keyboard, 0, sizeof *keyboard);
-
+	keyboard = xzalloc(sizeof *keyboard);
 	keyboard->keyboard = virtual_keyboard;
 	keyboard->window = window_create_custom(virtual_keyboard->display);
 	keyboard->widget = window_add_widget(keyboard->window, keyboard);