[cleanup] Indentation fix.
Fix issue with multiple initializers for classes that implement interfaces.

This could happen when having e.g. a ClassReferenceExp in
addition to the default initializer. Unfortunately, I could
not easily distill a test case for this issue from a large
application I was working on.
Merge pull request #742 from klickverbot/vtbl-initializer

Fix issue with multiple initializers for classes that implement interfaces.