Allow disambiguating class constructor definition followed by semicolon

[i-garrison]

In this case member variable declaration would be longer (including trailing semicolon) but it is not valid since a class C shall not contain a non-static member of class C:

template<typename T>
struct S {
	S(T) {}; // was recognized as declaration of variable T of type S before this change
};

S<int> s(1); // declared constructor was not found