Issue 4910, patch 2 of (probably) 3: pave the way for renaming of

nb_long:  remove last remaining use of nb_long
(in the struct module) from the core, set nb_long slots on all builtin
and extension types to 0, and remove uses of __long__ in test_complex
and test_binop.

Reviewed by Benjamin Peterson.

Objects/floatobject.c

@@ -1798,7 +1798,7 @@ static PyNumberMethods float_as_number = {
 	0,		/*nb_xor*/
 	0,		/*nb_or*/
 	float_trunc,	/*nb_int*/
-	float_trunc,	/*nb_long*/
+	0,		/*nb_long*/
 	float_float,	/*nb_float*/
 	0,		/* nb_inplace_add */
 	0,		/* nb_inplace_subtract */