fix bug in vismach stl import#604

Merged

andypugh merged 1 commit intoLinuxCNC:2.7from

sleepybishop:vismach_stl_import_bug-2.7

Jun 9, 2019

Commits on Jun 9, 2019

fix undefined variables causing some stl imports to fail in lib/python/vismach.py
sleepybishop
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