Philippe 20/02/2018: SURFEX: add special treatment if KP is zero size (to prevent problems with XLF)

Philippe 16/02/2018: SURFEX: bug correction: allocate some work arrays to 0,1,1 instead of 0,0,1 (crash with XLF)

Philippe 13/02/2018: re-added #ifndef MNH_SP4 to prevent problems when compiling on Blue Gene/Q with -qautodbl=4

Philippe: 24/10/2017: workaround in PREP_PGD due to NPROC set earlier than before (commit 86f22a35)

Juan 26/09/2017:interpol_field2d.F90, differencied error message :: SFX/NAM_IO_OFFLINE <=> MNH/NAM_PGDFILE

It was already possible but LEN_HREC was missing in some places.

(cherry picked from commit e2fbb2b2)

It was already possible but LEN_HREC was missing in some places.