Protect usage of `n` when it is `nullptr`

diff --git a/decision_control/slotplanner.cc b/decision_control/slotplanner.cc
index 8ac19e8e33bbde5ae265bcaec4991d72a215bc54..3f903aa6527a8a2a0be99d78de7bf80c6e3b26de 100644 (file)
--- a/decision_control/slotplanner.cc
+++ b/decision_control/slotplanner.cc
@@ -827,14 +827,14 @@ struct SamplingInfo ParallelSlot::getSamplingInfo()
 {
         struct SamplingInfo si;
         RRTNode *n = this->getMidd();
+        if (n == nullptr)
+                return si;
         BicycleCar *bc = new BicycleCar(n->x(), n->y(), n->h());
         RRTNode *cc;
         if (this->slotSide() == LEFT)
                 cc = bc->ccl();
         else
                 cc = bc->ccr();
-        if (n == nullptr)
-                return si;
         if (this->slotType() == PARALLEL) {
                 BicycleCar *nbc = bc->move(cc, this->slotHeading() - n->h());
                 si.x0 = nbc->x();