MSVC: work around C++ frontend bug

The compiler gets totally confused by the empty pack and simply disables
the broadcast ctor as "retaliation". WTF.

Signed-off-by: Matthias Kretz <kretz@kde.org>

Vc/common/generalinterface.h

@@ -51,12 +51,11 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
     ///////////////////////////////////////////////////////////////////////////
     // generator ctor
-    template <class G, class...,
+    template <class G, int = 0,
               class = typename std::enable_if<std::is_convertible<
                   decltype(std::declval<G>()(size_t())), value_type>::value>::type>
     explicit Vector(G &&g) : Vector(generate(std::forward<G>(g)))
     {
     }
 
-
 // vim: foldmethod=marker