Attempt to fix ThrowOrIgnoreBadComparer exception in LightSource.FindRaycastHits.

Couldn't reproduce the crash, but I'm guessing it could be caused by CompareCCW not returning 0 if comparing a position to itself. (and if not, at least the exception is caught now)

Subsurface/Source/Map/Lights/LightSource.cs

@@ -352,7 +352,19 @@ namespace Barotrauma.Lights
             points.AddRange(boundaryCorners);
 
             var compareCCW = new CompareSegmentPointCW(drawPos);
-            points.Sort(compareCCW);
+            try
+            {
+                points.Sort(compareCCW);
+            }
+            catch (Exception e)
+            {
+                StringBuilder sb = new StringBuilder("Constructing light volumes failed! Light pos: "+drawPos+", Hull verts:\n");
+                foreach (SegmentPoint sp in points)
+                {
+                    sb.AppendLine(sp.Pos.ToString());
+                }
+                DebugConsole.ThrowError(sb.ToString(), e);
+            }
             
             List<Vector2> output = new List<Vector2>();
 

Subsurface/Source/Utils/MathUtils.cs

@@ -512,6 +512,7 @@ namespace Barotrauma
 
         public static int Compare(Vector2 a, Vector2 b, Vector2 center)
         {
+            if (a == b) return 0;
             if (a.X - center.X >= 0 && b.X - center.X < 0) return -1;
             if (a.X - center.X < 0 && b.X - center.X >= 0) return 1;
             if (a.X - center.X == 0 && b.X - center.X == 0)