maxNativeZoom does not work with tms=true

[FIjaakko]

Tested with 0.7, 0.7.1 and 0.8-dev master branch. Tested with most recent version of Firefox, Chrome and IE10. The result is the same with all of these versions and browsers.

Creating a tileLayer with maxZoom: 19 and maxNativeZoom: 17 does not work when tms: true is also set. Only gray background is shown after maxNativeZoom.

I tried with tms: false and manually inverting the y-coordinate and then I get correctly scaled maxNativeZoom tiles.

[mourner]

Inviting TMS expert @perliedman to this issue.

[perliedman]

Will try to look into it, but I'm a bit pressed for time at the moment, hopefully better after christmas.

[perliedman]

I think I found the problem, _getWrapTileNum uses options.tileSize directly, which makes it not consider maxNativeZoom.

@mourner: this pull is for the stable branch, but the same (or very similar) fix should be done in master. I can make a pull request for master as well, if you like

[FIjaakko]

Seems to fix the issue. Thank you.

[mourner]

@perliedman thanks! It seems already fixed in master.