Fix bug from previous commit

HySoP/hysop/constants.py

@@ -18,13 +18,13 @@ else:
 
 PI = math.pi
 # Set default type for real and integer numbers
-PARMES_REAL = np.float32
+PARMES_REAL = np.float64
 # type for array indices
 PARMES_INDEX = np.uint32
 # type for integers
-PARMES_INTEGER = np.int32
+PARMES_INTEGER = np.int64
 # float type for MPI messages
-PARMES_MPI_REAL = MPI.FLOAT
+PARMES_MPI_REAL = MPI.DOUBLE
 ## default array layout (fortran or C convention)
 ORDER = 'F'
 ## Default array layout for MPI