Incorrect profiling of recursive functions using --with-profiling

Imported from http://bugzilla.roxen.com/bugzilla/show_bug.cgi?id=5131

Reported by Jonas Wallden jonasw@roxen.com

Note the bogus 950 seconds reported for fn() and its children. The 191 msec for the function itself is correct though.

Pike v7.8 release 371 running Hilfe v3.5 (Incremental Pike Frontend)
> class C { void fn(int x, int limit) { if (x < limit) fn(x + 1, limit); } };
> object c = C();                                                            
> gauge { c->fn(0, 10000); };                                                
(1) Result: 0.191259
> get_profiling_info(C);
(2) Result: ({ /* 2 elements */
                1,
                ([ /* 1 element */
                  "fn": ({ /* 3 elements */
                        10001,
                        950974,
                        191
                    })
                ])
            })