Diggy mask debug surface bug#1039

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SimonFlapse wants to merge 2 commits intoRefactorio:developfrom

SimonFlapse:diggy-mask-surface-bug

Commits on Feb 18, 2020

Added check to prevent crash when using debugging option
SimonFlapse
committed
Merge remote-tracking branch 'upstream/develop' into diggy-mask-surface-bug
SimonFlapse
committed