./configure --disable-shared was giving an error upon install
due to a missing file

see #227

Notice that without the fix this test fails.

backport of 4a96057e

thanks to @valsson

(still a stylistic warning)

Check first if astyle is present. In this way, when astyle is not compiled,
we get a single error instead of one error per file.

Updated headers for VES

Thanks @hanatok!

Also this after a discussion with @marcodelapierre

thanks to @marcodelapierre