Issue #1533: fix inconsistency in range function argument processing:

Issue #1533: fix inconsistency in range function argument processing:
any non-float non-integer argument is now converted to an integer (if
possible) using its __int__ method.  Previously, only small arguments
were treated this way; larger arguments (those whose __int__ was
outside the range of a C long) would produce a TypeError.

Patch by Alexander Belopolsky (with minor modifications).