bugfix: itemsize came out as float, which triggered an AssertionError
bugfix: itemsize came out as float, which triggered an AssertionError

jennolsen84/PyTables,PyTables/PyTables,andreabedini/PyTables,gdementen/PyTables,avalentino/PyTables,andreabedini/PyTables,jennolsen84/PyTables,jennolsen84/PyTables,andreabedini/PyTables,gdementen/PyTables,FrancescAlted/PyTables,andreabedini/PyTables,joonro/PyTables,avalentino/PyTables,gdementen/PyTables,rabernat/PyTables,rabernat/PyTables,FrancescAlted/PyTables,joonro/PyTables,joonro/PyTables,joonro/PyTables,mohamed-ali/PyTables,PyTables/PyTables,mohamed-ali/PyTables,FrancescAlted/PyTables,jennolsen84/PyTables,mohamed-ali/PyTables,gdementen/PyTables,rabernat/PyTables,rabernat/PyTables,PyTables/PyTables,mohamed-ali/PyTables,avalentino/PyTables