Fixed the print_header routine to report an error message if counters are not found, instead of a negative counter number. Tested by forcing the return value negative; not by running on a Mac, where the error first appeared.
Fixed the print_header routine to report an error message if counters are not found, instead of a negative counter number.
Tested by forcing the return value negative; not by running on a Mac, where the error first appeared.

pyrovski/papi,pyrovski/papi,pyrovski/papi,pyrovski/papi,arm-hpc/papi,pyrovski/papi,arm-hpc/papi,arm-hpc/papi,arm-hpc/papi,arm-hpc/papi,pyrovski/papi,pyrovski/papi,arm-hpc/papi,pyrovski/papi,arm-hpc/papi