ENH(BF?): allow for  long type in nextafter
ENH(BF?): allow for  long type in nextafter

Blind attempt to address failing tests of pandas on i386, e.g.
https://buildd.debian.org/status/fetch.php?pkg=pandas&arch=i386&ver=0.19.1-1&stamp=1479504883

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