[minor] fix bom price resetting on validation
[minor] fix bom price resetting on validation

indictranstech/erpnext,gsnbng/erpnext,indictranstech/erpnext,gsnbng/erpnext,geekroot/erpnext,geekroot/erpnext,gsnbng/erpnext,indictranstech/erpnext,gsnbng/erpnext,indictranstech/erpnext,geekroot/erpnext,Aptitudetech/ERPNext,geekroot/erpnext