Occupancy read error when there is blank

[CryoSky]

open3spn2/open3SPN2/ff3SPN2.py

Lines 468 to 469 in fc5c4cf

	occupancy=float(line[54:60]),
	tempFactor=float(line[60:66]),

The occupancy and temFactor could report error 'could not convert string to float' when there is blank.
Suggest to change like this:
occupancy=[0.0 if line[54:60].strip()=='' else float(line[54:60])],
tempFactor=[0.0 if line[60:66].strip()=='' else float(line[60:66])],

[cabb99]

Thank you, I changed it.
I just removed the brackets, since we are expecting a single number.

[CryoSky]

There is still some error. When I tested, it shows "IndentationError: unexpected indent".