[fixed] Tweak setting change - crash

[micheus]

Regarding the transparency of the magnet radius, was that a suggestion for me to change that? Since I can't find an area where the transparency is actually editable. Unless you meant the switch to "show magnet influence" to which Wings crashes with and without that checked off.

No, that was not a suggestion.
Transparency is editable in the "Tweak Preferences" -> "Magnet Radius Display Color". When you access the color dialog you will notice you have access to the Transparency component of the color, but I noticed it was doing nothing (it was hard coded).

again:
- The first crash was related to adjusting the the magnet influence;
- The second crash was about a try to change the color for magnet influence.

except if - again - we have a problem that is platform dependent.
I'm testing it in a 32bit one.