Fix pdb issues in Python 3.13.1 (ipython#14598)

For some reason it is not always set, it was/is a bug in IPython to not
check.

Author: Carreau

IPython/core/debugger.py

@@ -550,7 +550,7 @@ def _get_frame_locals(self, frame):
         So if frame is self.current_frame we instead return self.curframe_locals
 
         """
-        if frame is self.curframe:
+        if frame is getattr(self, "curframe", None):
             return self.curframe_locals
         else:
             return frame.f_locals