Änderungen

Summary

1. improved finding of single abstract method (commit: 272b40c) (details)

Commit 272b40cdda7386f089b1147b0e6c39e2ee0b0073 by peter.peq improved finding of single abstract method (commit: 272b40c)
	de.peeeq.wurstscript/src/main/java/de/peeeq/wurstscript/attributes/CheckHelper.java (diff)
	de.peeeq.wurstscript/src/main/java/de/peeeq/wurstscript/types/WurstTypeClassOrInterface.java (diff)
	de.peeeq.wurstscript/src/test/java/tests/wurstscript/tests/ClosureTests.java (diff)