Issue1415

AST node creation does not work in Jython in the same way as it does in
CPython.

Example:

try:
    #it's ast in Python 2.6
    import ast
except ImportError:
    #it's _ast in Python 2.5
    import _ast
    old_ast = 1

def astnode_genAssign( targets, value):
    if ( old_ast ):
        tmp = _ast.Assign()
        tmp.targets = targets
        tmp.value = value
        tmp.lineno = 0
        return tmp
    else:
        tmp = ast.Assign( )
        tmp.targets = targets
        tmp.value = value
        tmp.lineno = 0
        return tmp


A call to astnode_genAssign works in Python2.5 and Python2.6, but in
Jython 2.5 it produces:

 tmp = ast.Assign( )
TypeError: Assign() takes 2-4 arguments (0 given)

Fixed as of r6632