* mcs/expression.cs (Invocation.IsApplicable): Make public.
(Invocation.IsParamsMethodApplicable): Likewise.
* mcs/delegate.cs (Delegate.VerifyApplicability): Don't use
Invocation.VerifyArgumentCompat for parameter applicability
testing. Use Invocation.IsApplicable and Invocation.IsParamsMethodApplicable.
* tests/test-351.cs: New test from #68955.
svn path=/trunk/mcs/; revision=40996