Fixes integer type in periodic resorting
Fixes integer type in periodic resorting

As pointed out by @LaSerpe , the point counter should be an unsigned long
to allow large node counts.

drewkett/SU2,hlkline/SU2,hlkline/SU2,srange/SU2,drewkett/SU2,hlkline/SU2,srange/SU2,srange/SU2,drewkett/SU2,hlkline/SU2,drewkett/SU2,hlkline/SU2,srange/SU2,drewkett/SU2