cmdutil: use crecordmod.checkcurses

Instead of blindly trusting the user's experimental.crecord, we use checkcurses
to abstract that logic so that we can handle the case where python was not
built with curses.

mercurial/cmdutil.py

@@ -66,7 +66,7 def recordfilter(ui, originalhunks, oper
     what kind of filtering they are doing: reverting, committing, shelving, etc.
     *operation* has to be a translated string.
     """
-    usecurses =  ui.configbool('experimental', 'crecord', False)
+    usecurses = crecordmod.checkcurses(ui)
     testfile = ui.config('experimental', 'crecordtest', None)
     oldwrite = setupwrapcolorwrite(ui)
     try: