The SS pin of the 32u4 on Leonardo is connected just with RXLED and it is not available on D10 or on any other accessible point.
I am pretty sure that is just small change to Nick's code (not the ArduinoISP code that comes with 1.0.1) to use a different pin:
const byte RESET = 10; // --> goes to reset on the target board
Seems to compile ok as is for a Leonardo in 1.0.2.