Should fix potential NPE in cable rendering.

src/main/scala/li/cil/oc/common/block/Cable.scala

@@ -121,6 +121,7 @@ object Cable {
         case _ => !world.isAirBlock(tpos)
       }) {
         val neighborTileEntity = world.getTileEntity(tpos)
+        if (neighborTileEntity != null && neighborTileEntity.getWorld != null) {
           val neighborHasNode = hasNetworkNode(neighborTileEntity, side.getOpposite)
           val canConnectColor = canConnectBasedOnColor(tileEntity, neighborTileEntity)
           val canConnectFMP = !Mods.ForgeMultipart.isAvailable ||
@@ -131,6 +132,7 @@ object Cable {
           }
         }
       }
+    }
     result
   }