Modeller exception: LinkPrinting run ended with exception

[johpiip]

When using Print links from HELMET toolbox on ve0:

Modeller Exception
LinkPrinting run ended with exception: local variable 'zone_width' referenced before assignment

[johpiip]

Traceback (most recent call last):
  File "inro\director\application\director.py", line 948, in __start_tool
  File "inro\director\tool\tool.py", line 123, in _run
  File "C:/helmet/helmet_41/model-systems/helmet-model-system/Scripts/helmet_link_printing.py", line 34, in run
    self()
  File "C:/helmet/helmet_41/model-systems/helmet-model-system/Scripts/helmet_link_printing.py", line 40, in __call__
    print_links(scen.get_network(), ResultsData(self.results_path))
  File "C:\helmet\helmet_41\model-systems\helmet-model-system\Scripts\utils\print_links.py", line 26, in print_links
    noise_zone_width = noisemodel.calc_noise(link)
  File "C:\helmet\helmet_41\model-systems\helmet-model-system\Scripts\utils\calc_noise.py", line 78, in calc_noise
    return zone_width
inro.director.tool.exception.RunError: LinkPrinting run ended with exception: local variable 'zone_width' referenced before assignment

[johpiip]

Last one printed in ve0:

LINESTRING (25492851.0 6681520.0, 25492706.0 6681798.0)	1.198866367340088	4.666126728057861	1.7287718057632446	29.889680862426758	7.342296123504639	44.1534538269043	8.565292358398438	196.41278076171875	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	-1.0	-1.0	-1.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.03285999968647957	0.03285999968647957	0.03285999968647957	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.3100000023841858	-1.0	0	4.666126728057861	0.0	0.0	0.3100000023841858	0.3100000023841858	1.0	99	99	5

[johpiip]

Links printed in #434 and #436 branches work okay but they do't try to print noise buffers.