Changes for GISInternals-based Windows version

[wthaem]

What is the linked issue for this pull request:

QMS-#

What you have done:

Changed qunsetenv("GDAL_DRIVER_PATH"); ==> // qunsetenv("GDAL_DRIVER_PATH"); in CAppSetupWin.cpp to enable support for MBTiles/ECW/... maps

Steps to perform a simple smoke test:

1. Open whatever
2. Click here

Does the code comply to the coding rules and naming conventions Coding Guidelines:

• [ ] yes

Is every user facing string in a tr() macro?

• [ ] yes

Did you add the ticket number and title into the changelog? Keep the numeric order in each release block.

• [ ] yes, I didn't forget to change changelog.txt

[wthaem]

@kiozen: My indention was to get this PR in my new fork but it appeared in the main repo. Therefore, the description is incomplete and not linked to an issue. Sorry for this. Please, decide if the 2 changes made should go into the main repo, too. If not, please, delete this PR somehow.

[kiozen]

Let's see how this evolves and decide later if we want to merge it or keep the GIS Internals stuff on the fork

[kiozen]

@wthaem How do we want to proceed? I am tempted to merge the changes to dev.

[ ] Do it [ ] Wait for more [ ] Forget about it

Whatever you like.

[wthaem]

@kiozen: Do it (at least for Windows OS - no clue about other OS), but have a look at Mitxel's suggestion!

[kiozen]

I merge this for now to get it into the release.