Create the star related tasks in the extra hydro-loop creation function with a...

Create the star related tasks in the extra hydro-loop creation function with a dependency on the SF task.

examples/IsolatedGalaxy/IsolatedGalaxy_starformation/isolated_galaxy.yml

@@ -35,9 +35,10 @@ Statistics:
 
 # Parameters related to the initial conditions
 InitialConditions:
-  file_name:               fid.hdf5 # The file to read
+  file_name:               lowres8.hdf5 # The file to read
   periodic:                    0    # Are we running with periodic ICs?
-
+  stars_smoothing_length:      0.3
+  
 # Parameters for the hydrodynamics scheme
 SPH:
   resolution_eta:        1.2348   # Target smoothing length in units of the mean inter-particle separation (1.2348 == 48Ngbs with the cubic spline kernel).

src/cell.h

@@ -483,10 +483,11 @@ struct cell {
 
     /*! The task computing this cell's sorts before the density. */
     struct task *sorts_local;
-
-    /*! The task computing this cell's sorts before the feedback. */
     struct task *sorts_foreign;
 
+    /*! The drift task for sparts */    
+    struct task *drift;
+    
     /*! Max smoothing length in this cell. */
     double h_max;
 

src/space.c

@@ -226,6 +226,7 @@ void space_rebuild_recycle_mapper(void *map_data, int num_elements,
     c->timestep_limiter = NULL;
     c->end_force = NULL;
     c->hydro.drift = NULL;
+    c->stars.drift = NULL;
     c->grav.drift = NULL;
     c->grav.drift_out = NULL;
     c->hydro.cooling = NULL;