Small correction for mon-proc case

Interface.py

@@ -206,7 +206,7 @@ def finalfetch(part, routing_area, basin_count, route_togrid, route_tobasin, fet
             maxdiff_sorted = 0.0
         else :
             maxdiff_sorted = np.max(np.abs(sorted_outareas[0:largest_pos]-old_sorted))
-        old_sorted[:] = sorted_outareas[0:largest_pos]
+            old_sorted[:] = sorted_outareas[0:largest_pos]
         iter_count += 1
 
     #
@@ -402,12 +402,12 @@ class HydroSuper :
             # Precision in m^2 of the upstream areas when sorting.
             sorted_outareas = (np.unique(np.rint(np.array(xtmp)/prec))*prec)[::-1]
             # If mono-proc no need to iterate as fetch produces the full result.
+            l = min(sorted_outareas.shape[0],largest_pos)
             if part.size == 1 :
                 maxdiff_sorted = 0.0
             else :
-                l = min(sorted_outareas.shape[0],largest_pos)
                 maxdiff_sorted = np.max(np.abs(sorted_outareas[0:largest_pos]-old_sorted[0:l]))
-            old_sorted[:l] = sorted_outareas[0:largest_pos]
+                old_sorted[:l] = sorted_outareas[0:largest_pos]
             iter_count += 1
 
         self.fetch_basin = np.copy(fetch_basin)