Fix openmp bug with intel compilers v17-19.
Fix openmp bug with intel compilers v17-19.

An apparent intel compiler bug gives rise to an array bounds issue (even with 1 thread).
in nparticles_change.  Following the following appears to avoid it by reordering
an OpenMP variable list

https://software.intel.com/en-us/forums/intel-fortran-compiler/topic/806597

hande-qmc/hande,hande-qmc/hande,hande-qmc/hande,hande-qmc/hande,hande-qmc/hande