play: handle IndexError in keymap.process

Hit this by pressing Shift+up on an ancient machine:
Traceback (most recent call last):
  if self.methods[key] is None: return 0
IndexError: list index out of range

1 files changed, 4 insertions, 1 deletions

diff --git a/play.py b/play.py
index e5c165c..aa8e044 100755
--- a/play.py
+++ b/play.py
@@ -94,7 +94,10 @@ class Keymap:
         self.methods[key] = (method, args)
 
     def process(self, key):
-        if self.methods[key] is None: return 0
+        try:
+            if self.methods[key] is None: return 0
+        except IndexError:
+            return 0
         method, args = self.methods[key]
         if args is None: args = (key,)
         method(*args)