dcfldd returns a floating point exception on my
machine when started with 'statusinterval=0'.
This value should either be handled as invalid or
should be aquivalent to 'status=off'.
I wrote two small patches to add either one of this.
Patch for dcfldd-1.2.4 to turn status messages off when statusinterval=0 given
Patch for dcfldd-1.2.4 to handle statusinterval=0 as invalid