Stop mkoctfile process if any part of compilation or linking fails (bug #42704). * mkoctfile.in.cc (main): Add additional exit condition to for loops of !result where result is the exit status of the last system command.

#include "mex.h"

void
mexFunction (int nlhs, mxArray *plhs[],
             int nrhs, const mxArray *prhs[])
{
  mexPrintf ("Hello, World!\n");

  mexPrintf ("I have %d inputs and %d outputs\n", nrhs, nlhs);
}