Mihai Parparita b2855cfd86 derp/derphttp: fix nil pointer dereference when closing a netcheck client
NewNetcheckClient only initializes a subset of fields of derphttp.Client,
and the Close() call added by #5707 was result in a nil pointer dereference.
Make Close() safe to call when using NewNetcheckClient() too.

Fixes #5919

Signed-off-by: Mihai Parparita <mihai@tailscale.com>
2022-10-13 11:49:27 -07:00
..
2021-06-18 15:47:55 -07:00
2022-08-04 11:52:16 -07:00
2022-09-29 13:36:13 -07:00