[Shotwell] shotwell doesn't compile with 0.9.2

[Martin Olsson]

Vala git master (and the recently released 0.9.2) no longer compiles
Shotwell git master:
http://trac.yorba.org/ticket/2164

---

ColorTransformation.vala:35.9-35.33: error: unsupported lvalue in assignment
        this = hsv_pixel.to_rgb();
        ^^^^^^^^^^^^^^^^^^^^^^^^^

...for this Shotwell code:

    public RGBAnalyticPixel.from_hsv(HSVAnalyticPixel hsv_pixel) {
        this = hsv_pixel.to_rgb();
    }

---

commit 95b2e15a05fdd6ffa2a75654f06932378cd8ebbb
Author: Luca Bruno <lethalman88 at gmail.com>
Date:   Wed Jun 2 11:11:03 2010 +0200

    Do not support assigning to `this'

    Fixes bug 620120.


https://bugzilla.gnome.org/show_bug.cgi?id=620120