OsmApiException message is crippled by showMessageDialog

[robome]

The server just gave a 412 error on a upload.
While the exception on the console was ok:

org.openstreetmap.josm.io.OsmApiException: ResponseCode=412, Error Header=<Precondition failed: Node xxx is still used by way yyy.>,Error Body=<Precondition failed: Node xxx is still used by way yyy.
>

(besides the superfluous newline before the >), the dialogue lacked the message.
It was:

Uploading to the server '''failed''' because your current
dataset violates a precondition.
The error message is:
ResponseCode=412, Error Header=,Error Body=
></html>

I guess that's because showMessageDialog tries to interpret the actual message in <> as html tag and fails.

[Gubaer]

fixed in r1698

[Agimerm]

zenerx