Check lock owner before lock_release

Co-authored-by: Ian Hunt-Isaak <[email protected]>

Author: devRD

examples/event_handling/lasso_demo.py

@@ -87,9 +87,8 @@ def on_press(self, event):
         self.canvas.widgetlock(self.lasso)
 
     def on_release(self, event):
-        if self.canvas.widgetlock.locked():
+        if self.canvas.widgetlock.isowner(self.lasso):
             self.canvas.widgetlock.release(self.lasso)
-            return
 
 
 if __name__ == '__main__':