[syslinux] tftp behaves erroneously on "File not found"

[Роман Донченко]

Hello,

Looks like tftp-hpa handles missing files somewhat incorrectly. When it 
receives the error 1 (File not found), it sends back an acknowledgement for 
block #1 and creates an empty file. Protocol says errors terminate the 
connection.

I can't try other errors, as I can't cause them; but they may cause the same 
behaviour.

-- 
Roman.