patch-nad0018   wrong error from curses.wrapper if curses initialization fails

    One way this happens is trying under IDLE.app in OS X:
            import curses

            def scr(a):
              a.getch()

            curses.wrapper(scr)

    Traceback before patch:
        UnboundLocalError: local variable 'stdscr' referenced before assignment

    Traceback after patch:
        _curses.error: setupterm: could not find terminal


APPLIES         2.6, 2.7, 3.0, 3.1

diff -r bf28283300bf Lib/curses/wrapper.py
--- Lib/curses/wrapper.py	Tue Feb 10 18:00:24 2009 -0800
+++ Lib/curses/wrapper.py	Tue Feb 10 18:01:18 2009 -0800
@@ -44,7 +44,8 @@
         return func(stdscr, *args, **kwds)
     finally:
         # Set everything back to normal
-        stdscr.keypad(0)
-        curses.echo()
-        curses.nocbreak()
-        curses.endwin()
+        if 'stdscr' in locals():
+            stdscr.keypad(0)
+            curses.echo()
+            curses.nocbreak()
+            curses.endwin()