Fix spell checkers on Classic/SOD

[InfusOnWoW]

Sspells with have a min range, e.g. a spell with an 8-30y range, cannot be easily used of range checking, because if it isn't in range, that could be <8 or >30. Thus we used a second checker to distinguish between those two cases.

Previously only other spells would be consider, but in some cases classes have no spells that can fill that gap.

Thus use an idea by kodewdle to fall-back to the interact list. All we need is an interact distance that is bigger than min range and less than the max range.

Fixes: #16

[kodewdle]

Can you try whether the simpler: https://github.com/WeakAuras/LibRangeCheck-3.0/pull/18 works for you?

response here: https://github.com/WeakAuras/LibRangeCheck-3.0/pull/17#issuecomment-1981467509