Change the refine_and_coarsen_fixed_fraction (~number) functions such that they actually do not coarse (or refine) if the bottom(top)_fraction is set to 0
Change the refine_and_coarsen_fixed_fraction (~number) functions such that they actually do not coarse (or refine) if the bottom(top)_fraction is set to 0


git-svn-id: 31d9d2f6432a47c86a3640814024c107794ea77c@952 0785d39b-7218-0410-832d-ea1e28bc413d

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