Last image in each row stretched out

Hi,
I had problems with the stretched images too, but I was convinced that this problem was not present in versions before 2.0.
After compared the old source with the current one, the only noticeable difference was in

views-photo-grid.js

gridRow createItem function line: 125, this.items.push(item); was called after this.adjustRowHeight(item.height);
Inserting some console logs, I noticed that in each row the first image width is added twice to the usedWidth.
Since the adjustRowHeight recalculates the row usedWidth in my opinion its enough to calculate only in the other part of the if.
This small modification solved my stretched images problem.
Attached a small patch with this modification.

@martinlaci Thanks! Your patch in #3 works for me. Much better than the hack I was using.