Ensure exit when a closure fails after marshal.
We didn't correctly check for an exit condition after marshaling, this caused a discrepancy with our other callback code and segfaults if System.exit was used in signal callbacks.
Fixes #19 (closed)
We didn't correctly check for an exit condition after marshaling, this caused a discrepancy with our other callback code and segfaults if System.exit was used in signal callbacks.
Fixes #19 (closed)