send additionally a process id in QProcess signal

A great thing would be to update QProcess signals. For now if you want to start multiple process in a loop for example and create QProcess *p = new QProcess(); object at the heap you have no change to find out which process was started, finished or which process has changed its state. So I think the following singals from QProcess class should be updated with an process id to find that out from which process ths signal was emitted.

samples with process id:

void error(qint64 pid, QProcess::ProcessError error )
void finished(qint64 pid, int exitCode, QProcess::ExitStatus exitStatus )
void started(qint64 pid)
void stateChanged(qint64 pid, QProcess::ProcessState newState)