[2.2.14] Possible performance regression caused by !2052

While !2052 (merged) fixes crashes by these previously missing check, it also can make a performance regression making people with certain hardware configuration to lag noticibly.

Since 2.2.14 released, more and more people is aware of this so called frame rate issue and Xian mentioned that can be the cause by !2052 (merged) due to the safety checks in each mobj on the level.