Core/Spline: Fix crash

Fix crash when calling MoveSpline::ToString() on an empty spline

(cherry picked from commit 2bac44c7d04f490e08d209d4d1e17bc51e61eb8b)

1 files changed, 6 insertions, 1 deletions

diff --git a/src/server/game/Movement/Spline/Spline.h b/src/server/game/Movement/Spline/Spline.h
index f45c04551a2..3f20e2bed72 100644
--- a/src/server/game/Movement/Spline/Spline.h
+++ b/src/server/game/Movement/Spline/Spline.h
@@ -200,7 +200,12 @@ public:
     }
 
     /** Returns length of the whole spline. */
-    length_type length() const { return lengths[index_hi];}
+    length_type length() const
+    {
+        if (lengths.empty())
+            return 0;
+        return lengths[index_hi];
+    }
     /** Returns length between given nodes. */
     length_type length(index_type first, index_type last) const { return lengths[last]-lengths[first];}
     length_type length(index_type Idx) const { return lengths[Idx];}