crecord: ensure we reinstall the SIGWINCH handler

Previous, exception in _main(...) would prevent the reinstallation of the
signal.

mercurial/crecord.py

@@ -1616,7 +1616,9 are you sure you want to review/edit and
 
         origsigwinchhandler = signal.signal(signal.SIGWINCH,
                                             self.sigwinchhandler)
+        try:
         return self._main(stdscr)
+        finally:
         signal.signal(signal.SIGWINCH, origsigwinchhandler)
 
     def _main(self, stdscr):