[FIX] Issue with customer doctype not allowing name series past 10
[FIX] Issue with customer doctype not allowing name series past 10

Query used to fetch mast number in series breaks due to sql MAX function handing string and number ordering differently. This causes the last "[name] - 9" series to be picked up as last in the series instead of "[name] - 10". Fix is to cast value to unsigned to MAX handles ordering correctly.
njmube/erpnext,geekroot/erpnext,indictranstech/erpnext,njmube/erpnext,njmube/erpnext,Aptitudetech/ERPNext,geekroot/erpnext,geekroot/erpnext,gsnbng/erpnext,gsnbng/erpnext,indictranstech/erpnext,gsnbng/erpnext,geekroot/erpnext,njmube/erpnext,gsnbng/erpnext,indictranstech/erpnext,indictranstech/erpnext