Bug#974902: growlight: segfault during startup

[Nick Black]

thank you so much for the report! i resolved several issues in
the 1.2.19 release that hit Unstable today, though i'm not sure
that this is one of them -- i'll be able to do a closer analysis
this evening. it is also possible that this is related to
DBTS #974888. sorry for the annoyance and breakage, but you can
expect to see this fixed very soon.