#1301 Sales Order Search ignores customer name field

[John Locke]

Sales Order Search fails to filter on customer name

.. to reproduce,

Order Entry -> Reports -> Sales Orders

Enter a customer name, check both open and closed.

Expected result: all sales orders for customers matching the name

Actual result: all sales orders for all customers.

It does work correctly if you use a customer number.

[Chris Travers]

fixed for 1.4.18