fix Issue 13311 - ICE, CtorDeclaration::semantic(Scope*): Assertion `tf && tf->ty == Tfunction' failed
Merge pull request #3902 from 9rnsr/fix13311

[REG2.065] Issue 13311 - ICE, CtorDeclaration::semantic(Scope*): Assertion `tf && tf->ty == Tfunction' failed