#1 Fix int metaclass bug in 0.3.5

[Anonymous]

Typecheck 0.3.5 wrongly deduce that class with metaclass specified as parameters of accepts are custom functions.

If the class is a int subclass with metaclass, the type check will fail when the value returned by the constructor is 0 or false.

This patch resolve this issue by making Function typesig aware of metaclasses.

[Nobody/Anonymous]

int metaclass bugfix for 0.3.5