minor, updated the driver to handle linear case

bin/driver.py

@@ -100,14 +100,13 @@ if __name__ == '__main__':
     S  = [mesh_source.points[i] for i in indicies[3:] ]
     Sq = [mesh_source.q[i]      for i in indicies[3:] ]
     s_mesh = grid.grid(S, Sq)
-    print len(S)
 
     answer = baker.run_baker(X, r_mesh, s_mesh, options.verbose)
 
-    print "]\n[".join([str(i) for i in [answer, r_mesh, s_mesh]])
-    print
-    print
-    print
+    if answer['a'] == None:
+      errors.append(0)
+      continue
+
     exact = exact_func(X[0], X[1])
     if np.abs(exact - answer['final']) < np.abs(exact - answer['qlin']):
       success += 1