Diego Escalante Urrelo authored Jun 27, 2020 and Christian Hergert committed Jun 27, 2020

When starting a build stage `on_build_stage_query()` would crash when
the `IdeSubprocessLauncher` had a command line of more than 2 items and
none of those were ninja or ninja-build.

Found the crash when using a jhbuild pipeline, since its argv is
`jhbuild run ninja`, the first loop got stuck on comparing `jhbuild`
against ninja, ninja-build, and then infinity.

The above because `g_strv_contains()` expects NULL terminated arrays,
otherwise it will start accessing random memory and likely crash.