Don't flatten arrays of stochastic variables in checkpoint files #448
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This is another trivial, single-line bug fix that we've never gotten around to implementing, this time for issue #339. @jsigao suggested this as a solution and implemented it on his branch; I verified that it's sufficient to get rid of the issue. While the plan was to make it just one part of a more extensive checkpointing fix, it's been more than a year, and it seems worth fixing the issue even without a more general solution to MPI and MC^3 checkpointing problems. However, precisely because the problem of getting checkpointing to work under MPI is still unresolved, I'm holding off from adding a full-blown checkpointing test.