Fix discovery on np integers
Fix discovery on np integers

cowlicks/datashape,quantopian/datashape,cpcloud/datashape,llllllllll/datashape,ContinuumIO/datashape,ContinuumIO/datashape,cpcloud/datashape,blaze/datashape,quantopian/datashape,blaze/datashape,llllllllll/datashape,cowlicks/datashape