Bug#907941: libgda5 FTBFS with vala 0.42.0-1

[Adrian Bunk]

Source: libgda5
Version: 5.2.4-10
Severity: serious
Tags: ftbfs

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/libgda5.html

...
checking for valac... /usr/bin/valac
checking whether /usr/bin/valac is at least version 0.39.7... yes
checking for vapigen vapigen-0.40... no
configure: Searching for vapigen-0.40 program...
checking for vapigen-0.40... no
configure: error: Can't locate vapigen-0.40 >= 0.39.7 program