'printing' a calibrated spectrum doesn't work

[MMuellenmeister]

When using the command print on a visible, calibrated spectrum only gives the error
ERROR: Module 'scipy' has no attribute 'polyval'
and does not create a file/picture.

Example:

spectrum get test.spc
calibration position set 1 1.2
print

I suspect in line 191 of /hdtv/plugins/printing.py one has to change
en = scipy.polyval(calpolynom, en) to
en = numpy.polyval(calpolynom, en).

[janmayer]

Maybe - could you confirm your suspicion and open a Pull Request?