Initialize compname so that blosc_compress_ctx can use a default
Initialize compname so that blosc_compress_ctx can use a default

PyTables/PyTables,FrancescAlted/PyTables,avalentino/PyTables,PyTables/PyTables,FrancescAlted/PyTables,FrancescAlted/PyTables,PyTables/PyTables,avalentino/PyTables,avalentino/PyTables