Updated dump_particle_fields to reflect part struct changes.

tests/test27cells.c

@@ -184,7 +184,7 @@ void dump_particle_fields(char *fileName, struct cell *main_cell,
             main_cell->parts[pid].rho_dh, main_cell->parts[pid].density.wcount,
             main_cell->parts[pid].density.wcount_dh,
 #if defined(GADGET2_SPH)
-            main_cell->parts[pid].div_v, main_cell->parts[pid].density.rot_v[0],
+            main_cell->parts[pid].density.div_v, main_cell->parts[pid].density.rot_v[0],
             main_cell->parts[pid].density.rot_v[1],
             main_cell->parts[pid].density.rot_v[2]
 #elif defined(DEFAULT_SPH)
@@ -219,7 +219,7 @@ void dump_particle_fields(char *fileName, struct cell *main_cell,
               cj->parts[pjd].v[2], cj->parts[pjd].rho, cj->parts[pjd].rho_dh,
               cj->parts[pjd].density.wcount, cj->parts[pjd].density.wcount_dh,
 #if defined(GADGET2_SPH)
-              cj->parts[pjd].div_v, cj->parts[pjd].density.rot_v[0],
+              cj->parts[pjd].density.div_v, cj->parts[pjd].density.rot_v[0],
               cj->parts[pjd].density.rot_v[1], cj->parts[pjd].density.rot_v[2]
 #elif defined(DEFAULT_SPH)
               cj->parts[pjd].density.div_v, cj->parts[pjd].density.rot_v[0],