Ignore exact function pointer type in PyCFunction pointer comparison since...

Ignore exact function pointer type in PyCFunction pointer comparison since there is no use in figuring out the correct cast here.

Cython/Compiler/Nodes.py

@@ -4371,7 +4371,7 @@ class OverrideCheckNode(StatNode):
         code.put_gotref(func_node_temp)
 
         is_builtin_function_or_method = "PyCFunction_Check(%s)" % func_node_temp
-        is_overridden = "(PyCFunction_GET_FUNCTION(%s) != (PyCFunction)%s)" % (
+        is_overridden = "(PyCFunction_GET_FUNCTION(%s) != (PyCFunction)(void*)%s)" % (
             func_node_temp, self.py_func.entry.func_cname)
         code.putln("if (!%s || %s) {" % (is_builtin_function_or_method, is_overridden))
         self.body.generate_execution_code(code)