OCLC numbers are converted to int in a way that is ... probably not right

[aelkiss]

hathifiles_database/lib/hathifiles_database/linespec.rb

Lines 65 to 71 in 0939c84

	TO_INT = ->(str) do
	begin
	Integer(str, 10)
	rescue
	9999
	end
	end

I didn't see any in the table with OCN 9999, but it implies that OCNs are:

• limited to 10 digits max
• if they aren't parseable as integers, changed to 9999

That is not how OCNs should work.