Workaround for barriers in specific platforms.   Fixes #136.
Workaround for barriers in specific platforms.   Fixes #136.

mohamed-ali/PyTables,cpcloud/PyTables,andreabedini/PyTables,avalentino/PyTables,tp199911/PyTables,dotsdl/PyTables,rabernat/PyTables,gdementen/PyTables,tp199911/PyTables,rabernat/PyTables,mohamed-ali/PyTables,avalentino/PyTables,mohamed-ali/PyTables,cpcloud/PyTables,dotsdl/PyTables,rdhyee/PyTables,gdementen/PyTables,dotsdl/PyTables,dotsdl/PyTables,jennolsen84/PyTables,joonro/PyTables,rabernat/PyTables,FrancescAlted/PyTables,rabernat/PyTables,andreabedini/PyTables,jennolsen84/PyTables,mohamed-ali/PyTables,rdhyee/PyTables,rdhyee/PyTables,andreabedini/PyTables,tp199911/PyTables,PyTables/PyTables,jack-pappas/PyTables,PyTables/PyTables,cpcloud/PyTables,joonro/PyTables,jennolsen84/PyTables,jack-pappas/PyTables,gdementen/PyTables,jack-pappas/PyTables,rdhyee/PyTables,andreabedini/PyTables,FrancescAlted/PyTables,cpcloud/PyTables,PyTables/PyTables,jennolsen84/PyTables,jack-pappas/PyTables,joonro/PyTables,jack-pappas/PyTables,avalentino/PyTables,gdementen/PyTables,tp199911/PyTables,FrancescAlted/PyTables,joonro/PyTables