Null-Check for GeneratorInstance (#177)

If SEWorldGenerator Plugin is used or Procedural Seed is 0 there will be no GeneratorInstance. In this case this Method will NRE.

However we still would like to delete stuff. So just return null. Because when there is no GeneratorInstance we dont have to tell itentities are being deleted.

Luckily the IDisposable in the using() block is Nullable :-)

Author: LordTylus

Essentials/Commands/VoxelModule.cs

@@ -345,6 +345,17 @@ private static bool ResetVoxelInArea(Vector3D Center, float Radius)
 
         private static LockToken PinDelete()
         {
+            /* 
+             * If SEWorldGenerator Plugin is used or Procedural Seed is 0 there 
+             * will be no GeneratorInstance. In this case this Method will NRE.
+             * 
+             * However we still would like to delete stuff. So just return null. 
+             * Because when there is no GeneratorInstance we dont have to tell it
+             * entities are being deleted.
+             */
+            if (GeneratorInstance == null)
+                return null;
+
             return new LockToken();
         }