window: Compare currentTile to requestedTile
On scaled displays, the previous geometry comparisons got rounded differently (or not rounded at all), and thus did not match 1-to-1. This caused the tiling to always get the first position, instead of moving to next one.
This patch just compares the currentTile to previously requestedTile. If none is found, we request a new tile.
Edited by Akseli Lahtinen