std::map<OUString, basegfx::BColor>::iterator itColor = aColors.find(aLevel);

vs

auto itColor = aColors.find(aLevel);

and so on.

(And do the same at two other places as well.)

Change-Id: I538998c8b8afdf18a7eb139fa4d469205c561370
Reviewed-on: https://gerrit.libreoffice.org/26046Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>