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r7067 | pogokeen | 2018-10-10 14:04:42 -0700 (Wed, 10 Oct 2018) | 2 lines

engine.cpp: fix crash when calling `setrendermode 3` where PolymostProcessVoxels would be called before Polymost is initialized.
PolymostProcessVoxels would call videoNextPage during processing which would attempt to render the OSD and lead to a segfault due to Polymost not being properly initialized.
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