Replace ||= with correct operation

Author: firejoust

src/heuristics/distance.js

@@ -176,7 +176,7 @@ module.exports.inject = function inject(bot, Set) {
                                 } else
 
                                 // don't stop doing ceiling checks in current iteration
-                                ceilingCheck ||= false
+                                ceilingCheck = ceilingCheck || false
                             }
                         }
 
@@ -224,4 +224,4 @@ module.exports.inject = function inject(bot, Set) {
             return 0
         }
     }
-}
+}