Inline fix

I inline most often call by openxcom and their implementation is simple enough to see difference.
Only difference except inlinig this functions is `getMapData` where I remove test.

Most time this change give around 10% overall speed up, but in some cases It can be bigger. Best way to see it is run terror mission with multiple enemies close to landing zone. After every step of your solder game will freeze for short moment to calculate LoS of ever enemy. With this fix game will not freeze in that case.