Stackless issue #290: fix two compiler warnings on Windows 64bit

Author: Anselm Kruis

Objects/typeobject.c

@@ -997,7 +997,7 @@ type_call(PyTypeObject *type, PyObject *args, PyObject *kwds)
         int is_stackless;
         if (tp_init == slot_tp_init)
             STACKLESS_PROMOTE_ALL();
-        is_stackless = _PyStackless_TRY_STACKLESS;
+        is_stackless = !!_PyStackless_TRY_STACKLESS;
 #endif
         res = tp_init(obj, args, kwds);
 #ifdef STACKLESS

Stackless/module/stacklessmodule.c

@@ -1105,7 +1105,7 @@ test_nostacklesscall_call(PyObject *f, PyObject *arg, PyObject *kw)
     PyObject * callback1;
     PyObject * callback2 = NULL;
     PyObject * rest;
-    int stackless = _PyStackless_TRY_STACKLESS;
+    int stackless = !!_PyStackless_TRY_STACKLESS;
 
     callback1 = PyTuple_GetItem(arg, 0);
     if (callback1 == NULL)