fix: filter with item group only if it is mentioned in pos profile

(cherry picked from commit 0964107)

erpnext/selling/page/point_of_sale/point_of_sale.py

@@ -96,6 +96,8 @@ def __sort(p):
 def filter_result_items(result, pos_profile):
 	if result and result.get("items"):
 		pos_item_groups = frappe.db.get_all("POS Item Group", {"parent": pos_profile}, pluck="item_group")
+		if not pos_item_groups:
+			return
 		result["items"] = [item for item in result.get("items") if item.get("item_group") in pos_item_groups]