Fixed bug in interactions::energy(vec<p>, int)
Fixed bug in interactions::energy(vec<p>, int)

bjornstenqvist/faunus,gitesei/faunus,mlund/faunus,bjornstenqvist/faunus,mlund/faunus,mlund/faunus,gitesei/faunus,bjornstenqvist/faunus,gitesei/faunus