fix Issue 13675 - enum type used with template causes compiler to segfault
Merge pull request #4109 from 9rnsr/fix13675

[REG2.065] Issue 13675 - enum type used with template causes compiler to segfault
fix Issue 13694 - Typesafe variadic function template overload fails to match to any template
fix 12528 in interpret3.d
stash, interpret3 and testconst fixed
+13180 in template9.d
+clean