Little bug in firmware selection

There's a little bug that prevents to run the program with fw parameter values other than "base" ones (702 for example). In line 159 you determine the "base" offset by calling ``auto offset = getFirmwareOffset(fw);`` but later, in line 176 you try to set firmware offset with: ``if (exploit->setFirmwareVersion((FirmwareVersion) fw)) return 1;`` But that function only accepts "base" firmware versions, so it should be ``if (exploit->setFirmwareVersion((FirmwareVersion) offset)) return 1;``