Fix vend lock checking

abrandemuehl · abrandemuehl · commit 5687bbbf180c · 2017-04-08T14:28:13.000-05:00
diff --git a/machine_controller/vend.py b/machine_controller/vend.py
@@ -70,7 +70,7 @@ def release(self):
 
     def inUse(self):
         # Trylock
-        return not self.lock.acquire(False)
+        return self.lock.locked()
 
 
     def __cleanup(self):
