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fixes getppid(), and the second fixes the next bug which is revealed once getppid() does what LinuxThreads wants; LinuxThreads uses SIGKILL to kill off stray threads, but if we send naked SIGKILLs to Valgrind threads, they'll die without cleaning up or informing anyone of their death, which means that they're waited on forever. ADAPTED FROM CVS HEAD git-svn-id: svn://svn.valgrind.org/valgrind/trunk@3449