Go: incorrect component access handling

[GoogleCodeExporter]

Must handle as follows:

var p Point
_ = p.x // read of x
p.x = 1 // write to x

var pp *Point
_ = pp.x // read of pp and x
pp.x = 1 // read of pp and write to x

and so on.

Original issue reported on code.google.com by dvyu...@google.com on 17 Jan 2012 at 11:02