Fix https://github.com/Sprytile/Sprytile/issues/139

[ajbaldocchi]

sel_min uses Blender's Vector which returns floats but tilegrid.tile_selection[#] expects int so an int is created when assigned in sprytile_gui.py

draw_preview can be used before modal in sprytile_modal.py so is initialized outside of modal()

[VictoriousFan]

Ay thanks for this fix

[TheBricktop]

Ive tried Your fix too and im sorry to say that the scaling of the palette works but as soon as im starting to create new tiles in edit mode im greeted with long list of errors and the blender crashes, im using Your version on blender 3.2.2

[ajbaldocchi]

@TheBricktop are you applying these changes on top of 0.5.25 or are you just checking out this version? These changes are based on master (which is 0.5.10) but master doesn't have the other open PR merged (but the 0.5.25 version you install from itch.io does have it included). To run successfully you need both sets of changes so the best option is to install 0.5.25 and then manually apply the changes from this PR to it.

[TheBricktop]

Since the original owner of sprytile is not active on GitHub I could merge the changes on my fork for brevity.

[ajbaldocchi]

Considering the permissive MIT license you're welcome to do all of the modifications you would like on your fork