e2dbg fails to intercept call to exit_group() at process exit

[thorkill]

When debugging a program with e2dbg, and that program finishes with a exit_group(), the debugger fails to catch the process exit, and it is necessary to do ctrl-c to quit the debugger.

e2dbg should be able to detect the process exit and end the debugging session gracefully.

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Ticket: 114 Reported by: may on Tue Jan 13 18:39:14 2009