allow to build ActualActual with schedule

quantlib/time/daycounters/_actual_actual.pxd

@@ -1,9 +1,10 @@
 from quantlib.time._daycounter cimport DayCounter
+from quantlib.time._schedule cimport Schedule
 
 
-
-cdef extern from 'ql/time/daycounters/actualactual.hpp' namespace 'QuantLib':
+cdef extern from 'ql/time/daycounters/actualactual.hpp' namespace 'QuantLib' nogil:
     cdef cppclass ActualActual(DayCounter):
         enum Convention:
             pass
-        ActualActual(Convention)
+        ActualActual(Convention c)
+        ActualActual(Convention c, const Schedule& schedule)

quantlib/time/daycounters/actual_actual.pyx

@@ -13,13 +13,15 @@ For more details, refer to
 https://www.isda.org/a/pIJEE/The-Actual-Actual-Day-Count-Fraction-1999.pdf
 '''
 
+from cython.operator cimport dereference as deref
 cimport quantlib.time._daycounter as _daycounter
 cimport quantlib.time.daycounters._actual_actual as _aa
+from quantlib.time.schedule cimport Schedule
 from quantlib.time.daycounter cimport DayCounter
 
 cdef class ActualActual(DayCounter):
 
-    def __init__(self, Convention convention=Convention.ISDA):
+    def __init__(self, Convention convention=Convention.ISDA, Schedule schedule=Schedule.from_dates([])):
         """ Actual/Actual day count
 
         The day count can be calculated according to:
@@ -35,7 +37,7 @@ cdef class ActualActual(DayCounter):
         https://www.isda.org/a/pIJEE/The-Actual-Actual-Day-Count-Fraction-1999.pdf
         """
         self._thisptr = <_daycounter.DayCounter*> new \
-            _aa.ActualActual(convention)
+            _aa.ActualActual(convention, deref(schedule._thisptr))
 
 cdef _daycounter.DayCounter* from_name(str convention):