Fix loading increasing the turn counter on loading and creating map [CR]

OK, this is an attempt to fix #7430.

This basically just prevents the turn counter being increased when the map has been created.

I made some quick tests. The turn counter does not increase on map creation and map load anymore. Also, no monsters move.

It *seems* to work.

**Warning**: Do *not* merge this without further testing or analysis. Chances are, that this just increases more bugs or does actually not fully fix the bug.

Feel free to close this PR unmerged if it turns out to be flawed.