Can't build vala bindings with 5.2.5
I think the changes to configure.ac in de7b38d9 are a bit broken.
vala_api is set here but now it's never changed:
vala_api="No Vala bindings will be generated"
Also this line is a problem since the current version of valac is 0.42
In Debian, we had been manually patching that and the similar lines to bump the version to the current version of vala.
Because of this commit, I can't build the vala bindings for 5.2.5 on Debian.