helixish: fix global gamma

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/symbolic.py b/symbolic.py
index 3486f3a85fed15ccc3a05df257eb189964cc53fe..ef0d9cf10e05806b3ffb5a3c1a14e6941ddd070a 100644 (file)
--- a/symbolic.py
+++ b/symbolic.py
@@ -163,6 +163,7 @@ def calculate():
     dbg('diff(q_dirn_sqparm,%s)' % v)
   dprint('----------------------------------------')
 
+  global gamma
   gamma = symbols('gamma')
 
   q_dirn_dirnscaled = q_dirn_sqparm * gamma