[PATCH] Make sure we die if we don't get enough arguments.

Signed-off-by: Fredrik Kuivinen <freku045@student.liu.se>
Signed-off-by: Junio C Hamano <junkio@cox.net>

git-merge-fredrik.py

@@ -392,6 +392,9 @@ def usage():
 # This strategy module figures out merge bases itself, so we only
 # get heads.
 
+if len(sys.argv) < 4:
+    usage()
+
 for nextArg in xrange(1, len(sys.argv)):
     if sys.argv[nextArg] == '--':
         if len(sys.argv) != nextArg + 3: