Fix crash in __pthread_kill

[splinesoft-ci]

Version: 1.8.7 (775) | com.splinesoft.theMUDRammer

Reason

No reason found. Full stack trace includes libsystem_kernel.dylib, libsystem_pthread.dylib, libsystem_c.dylib, libc++abi.dylib, libobjc.A.dylib, libdispatch.dylib.

Link to HockeyApp

• https://rink.hockeyapp.net/manage/apps/115193/crash_reasons/293618298