Pointer association in nf_fread*d routines

[arango]

It turns out that we need to follow the point association rules for array IJwater in the call to mp_scatter in input routines nf_fread2d.F, nf_fread3d.F, and nf_fread4d.F when the READ_WATER option is activated. Although these input routines are not inside a module, the mp_scatter routine is and this array is passed as a pointer using the SCALARS(ng)%IJwater synthax. This problem is also found in routine white_noise.F.

This is similar to ​src:ticket:228 and discovered using ifort 10.1. Many thanks to Mathieu Dutour for reporting this problem.