CythonExtensionType type test unification (DictNode memory init code)

Cython/Compiler/ExprNodes.py

@@ -8843,9 +8843,12 @@ class DictNode(ExprNode):
         #  pairs are evaluated and used one at a time.
         code.mark_pos(self.pos)
         self.allocate_temp_result(code)
-        if hasattr(self.type, 'nogil') and self.type.nogil:
+        if self.type.is_extension_type and not self.type.is_pyobject:
+            # CythonExtensionTypes are allocated "by-hand"
             code.putln("%s = (struct %s *)malloc(sizeof(struct %s));" % (self.result(), self.type.objstruct_cname, self.type.objstruct_cname))
+            # And their method table must be properly set (self.type.vtabptr_cname is set at runtime)
             code.putln("%s->%s = %s;" % (self.result(), self.type.vtabslot_cname, self.type.vtabptr_cname))
+            # Finally set the reference counting
             code.putln("_CyObject_CAST(%s)->ob_refcnt = 1;" % self.result())
 
         is_dict = self.type.is_pyobject