B9 Precoolers fix

Trying to attach a sabre intake to a precooler when using B9 causes an endless stream of null reference expeditions and stack overflows, causing many issues in the SPH (Parts not attaching; parts getting stuck to mouse cursors; unable to leave SPH either via exit or launch buttons or the menu; eventual lockup; other major glitches). 
Note that this is with other mods installed, I suspect that there is some KSP Interstellar shenanigans involved with the precoolers in some way.

These issues where fixed by removing/commenting out b9 sabre precoolers and intakes.
I have commented out the sabre precoolers and intakes.