Description of problem:
if use  "ltrace -f" to trace a process which could create a new process, 
ltrace can't trace the new created process.
I have made a patch to fix this issue.

Version-Release number of selected component (if applicable):
RHEL5

How reproducible:
100%


Steps to Reproduce:
#ltrace -f ./child
the child will create a new process by fork()
  
Actual results:
ltrace fails to trace the new created process, it reported as follow:
fork(Cannot attach to pid 18609: Operation not permitted
signal from wrong pid 18609 ?!?

Expected results:
ltrace shall trace the new created process.

Additional info:
traced program child.c is as follow:
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <signal.h>

int main()
{
        pid_t pid;
        pid = fork();
        if(pid == 0) {
                printf("This is child\n");
                sleep(1);
        } else if(pid > 0) {
                printf("This is parent\n");
        } else {
                exit(1);
        }
        exit(0);
}