[Fix] Set default backup limit for sites which are not set

frappe/patches.txt

@@ -144,3 +144,4 @@ execute:frappe.db.set_value("Print Settings", "Print Settings", "add_draft_headi
 frappe.patches.v7_0.cleanup_list_settings
 execute:frappe.db.set_default('language', '')
 frappe.patches.v7_1.refactor_integration_broker
+frappe.patches.v7_1.set_backup_limit

frappe/patches/v7_1/set_backup_limit.py

@@ -0,0 +1,9 @@
+from __future__ import unicode_literals
+from frappe.utils import cint
+import frappe
+
+def execute():
+    backup_limit = frappe.db.get_single_value('System Settings', 'backup_limit')
+    
+    if cint(backup_limit) == 0:
+        frappe.db.set_value('System Settings', 'System Settings', 'backup_limit', 3)