Sonar/FindBugs:
- Dodgy - Redundant nullcheck of value known to be non-null
- Dodgy - Write to static field from instance method

git-svn-id: http://josm.openstreetmap.de/svn/trunk@6265 0c6e7542-c601-0410-84e7-c038aed88b3b
Merge branch 'master' into mirror