[CVS ci] exceptions-5: die_hard opcode does longjmp

[Leopold Toetsch]

Let the fun begin:
- in interpreter is a setjmp in front of calling the runloop
- die_hard longjmp's there and reenters the runloop in the exception 
handler, if any. s. t/op/hacks.t.

Enough for today. Some spritzers[1] are waiting.

Have fun,
leo
[1] Grüner Veltliner + H2O + CO2 (inside the latter)