From: Hannu Niemistö <hannu.niemisto@semantum.fi>
Date: Wed, 21 Nov 2018 11:22:52 +0000 (+0200)
Subject: Prevent some NPEs in Graphviz plugin
X-Git-Tag: v1.43.0~136^2~258
X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=commitdiff_plain;h=d14bfb83fddf30539f401de54ce9f61bd0aff25c;hp=d14bfb83fddf30539f401de54ce9f61bd0aff25c

Prevent some NPEs in Graphviz plugin

gitlab #209

Change-Id: Id29a4e20470ca63c07e3b0be41b6b12bf2e1281a
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