Update function_dependencies.php

[osworx]

Get proper value if WIN is used (basically all return values other than 0 are errors/messages).

Beside this: the stored file here is very different from the distribution package (there you have e.g. a check if function check exists ..).

[EddyLB]

Fixed with feb269d659dc7a2b14deeed6a243ed15ad1cb119 by considering additional cases.