Call tp_init in typeCall for extension classes

Actually, for now in all cases unless __init__ is a Python function.

src/capi/typeobject.cpp

@@ -1152,7 +1152,7 @@ static PyObject* slot_tp_del(PyObject* self) noexcept {
     }
 }
 
-static int slot_tp_init(PyObject* self, PyObject* args, PyObject* kwds) noexcept {
+/* Pyston change: static */ int slot_tp_init(PyObject* self, PyObject* args, PyObject* kwds) noexcept {
     STAT_TIMER(t0, "us_timer_slot_tpinit", SLOT_AVOIDABILITY(self));
 
     static PyObject* init_str;

src/capi/typeobject.h

@@ -51,6 +51,7 @@ int slot_sq_contains(PyObject* self, PyObject* value) noexcept;
 Py_ssize_t slot_sq_length(PyObject* self) noexcept;
 PyObject* slot_tp_getattr_hook(PyObject* self, PyObject* name) noexcept;
 PyObject* tp_new_wrapper(PyTypeObject* self, BoxedTuple* args, Box* kwds) noexcept;
+int slot_tp_init(PyObject* self, PyObject* args, PyObject* kwds) noexcept;
 
 class GetattrRewriteArgs;
 Box* slotTpGetattrHookInternal(Box* self, BoxedString* attr, GetattrRewriteArgs* rewrite_args);

src/runtime/descr.cpp

@@ -75,9 +75,9 @@ static Box* propertyInit(Box* _self, Box* fget, Box* fset, Box** args) {
     Box* doc = args[1];
 
     BoxedProperty* self = static_cast<BoxedProperty*>(_self);
-    self->prop_get = fget;
-    self->prop_set = fset;
-    self->prop_del = fdel;
+    self->prop_get = fget == None ? NULL : fget;
+    self->prop_set = fset == None ? NULL : fset;
+    self->prop_del = fdel == None ? NULL : fdel;
     self->prop_doc = doc;
     self->getter_doc = false;
 
@@ -151,6 +151,12 @@ static Box* property_copy(BoxedProperty* old, Box* get, Box* set, Box* del) {
 
         return prop;
     } else {
+        if (!get)
+            get = None;
+        if (!set)
+            set = None;
+        if (!del)
+            del = None;
         Box* doc;
         if ((old->getter_doc && get != None) || !old->prop_doc)
             doc = None;