Do not consider an empty DNP/dnp field as do not place - require '1'

[mdeweerd]

I had a few components that were missing from the BOM generated under KiBot.
It turned out that there was an empty dnp field:

An empty dnp field should not be counted as a do not place value - it's only a dnp if the value is set to 1 (or not 0).

[set-soft]

Thanks @mdeweerd !

It was implemented before we added this clarification to the docs.

I don't have a test case at hand, I just changed the regular expression to avoid filtering empty fields. Let me know if it works for you.

[mdeweerd]

I'ld have to create a test case too, I adjusted the schematic files. I'll probably create a few test cases ;-).