Hi everybody,

thanks for supplying this great library.

Recently I have come across a problem (V 7.37.1) in curl_formadd()
which could be avoided without too much effort.

I am sending binary data without zero terminator bytes in fields, so I
set CURLFORM_CONTENTSLENGTH. Sometimes this data can be of
size 0 - I want to see an empty form field in the transmitted data in
that case. However, in the current implementation, size 0 is also the
value indicating an unset content length, so instead garbage is
transmitted until the first random zero byte is hit. I am now checking
for this condition beforehand and use an empty "" string in these
cases and thus
circumvent this problem. But I think for the sake of consistency and
ease of use, it might be a good idea to change the internal "unset" default
value to something like -1, so that you can explicitly set a zero
field data length.

-- 
Wolf-D. Ihlenfeldt -  Xemistry GmbH - wdi_at_xemistry.com
Phone: +49 6174 201455 - Fax +49 6174 209665
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