Fix multiview limit;
Fix multiview limit;

When multiview is not supported (although technically lovr requires it),
the renderSize limit for array layers was zero, which meant no render
passes would work.  Instead, make sure it's at least 1, which is more
correct.

bjornbytes/lovr,bjornbytes/lovr,bjornbytes/lovr,bjornbytes/lovr,bjornbytes/lovr