# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1444343102 -7200
# Node ID 0b1174b0f4446e947328b5d05d6144702f4f1905
# Parent  01d3243e1374045430cb063eb8e623fe2633ceb3
Initialise the extra function properly for module usage.

diff -r 01d3243e1374 -r 0b1174b0f444 optimiser.py
--- a/optimiser.py	Fri Oct 09 00:01:29 2015 +0200
+++ b/optimiser.py	Fri Oct 09 00:25:02 2015 +0200
@@ -35,6 +35,8 @@
 
 # Basic colour operations.
 
+def extra(x): return x
+
 def within(v, lower, upper):
     return min(max(v, lower), upper)
 
@@ -336,8 +338,6 @@
     use_square = "-2" in options
     if use_square:
         extra = square
-    else:
-        extra = (lambda x: x)
 
     # General output options.