Merge pull request #1078 from brackendawson/Marlin_v1

Fix build for non-sled bed auto levelling

Marlin/Marlin_main.cpp

   } //retract
 #endif //FWRETRACT
 
-#ifdef ENABLE_AUTO_BED_LEVELING
+#ifdef Z_PROBE_SLED
 //
 // Method to dock/undock a sled designed by Charles Bell.
 //