Philippe 06/02/2019: minor: standardize 2 units in written/read fields

src/MNH/lima_ccn_activation.f90

@@ -472,7 +472,7 @@ IF ( OCLOSE_OUT ) THEN
   TZFIELD%CMNHNAME   ='NACT'
   TZFIELD%CSTDNAME   = ''
   TZFIELD%CLONGNAME  = TRIM(TZFIELD%CMNHNAME)
-  TZFIELD%CUNITS     = '/kg'
+  TZFIELD%CUNITS     = 'kg-1'
   TZFIELD%CDIR       = 'XY'
   TZFIELD%CCOMMENT   = 'X_Y_Z_NACT'
   TZFIELD%NGRID      = 1

src/MNH/lima_warm_nucl.f90

@@ -540,7 +540,7 @@ IF ( OCLOSE_OUT ) THEN
   TZFIELD%CMNHNAME   ='NACT'
   TZFIELD%CSTDNAME   = ''
   TZFIELD%CLONGNAME  = TRIM(TZFIELD%CMNHNAME)
-  TZFIELD%CUNITS     = '/kg'
+  TZFIELD%CUNITS     = 'kg-1'
   TZFIELD%CDIR       = 'XY'
   TZFIELD%CCOMMENT   = 'X_Y_Z_NACT'
   TZFIELD%NGRID      = 1