Separate error-check code from method logic

[Locked]

the null checks in OsmPrimitive#visitReferrers should be seaprated from the method logic

[Locked]

Patch to improve the code

[simon04]

Semantically, I don't see a difference. I don't see a problem with the current code.

Without improvement, such changes are discouraged (see DevelopersGuide/SVN_Account#RulesforJOSMaccount).

[Locked]

Just thought it would be more readable to separate sanity null-checks from the business logic.

[bastiK]

We don't want patches, that only change the coding style. If you change formatting, only, you are correcting someone else's work, although it's just a matter of taste. If you do change the code (but only for cosmetic reasons), it's discouraged, because it may introduce bugs. Let's focus on new features, improvements, bug fixes, documentation, unit tests, and so on.