Misplaced if-statement leading to 0-sized time-step for gparts with counterparts

src/runner.c

@@ -929,7 +929,9 @@ void runner_dokick(struct runner *r, struct cell *c, int timer) {
       struct gpart *const gp = &gparts[k];
 
       /* If the g-particle has no counterpart and needs to be kicked */
-      if (gp->id < 0 && (is_fixdt || gp->ti_end <= ti_current)) {
+      if (gp->id < 0) {
+
+	if (is_fixdt || gp->ti_end <= ti_current) {
 	  
 	  /* First, finish the force calculation */
 	  gravity_end_force(gp);
@@ -999,6 +1001,7 @@ void runner_dokick(struct runner *r, struct cell *c, int timer) {
 	ti_end_min = min(gp->ti_end, ti_end_min);
 	ti_end_max = max(gp->ti_end, ti_end_max);
       }
+    }
 
     /* Now do the hydro ones... */