Serial.print broken

if i try and use Serial.print with a f64 object, this should be supported as it inherits from Printable
however on my nano and mega this seems to cause a hang and or a restart.
it seems to be due to this line:
https://github.com/mmoller2k/Float64/blob/master/Float64ops.cpp#L232

As it appears to be for debug purposes I've commented it out and the code now works as expected.