fixed bug in Pipeline heuristics

imagine/pipeline.py

@@ -150,7 +150,7 @@ class Pipeline(Loggable, object):
         # heuristic for minimizers:
         # if a parameter value from outside of the cube is requested, return
         # the worst possible likelihood value
-        if np.any(abs(cube_content) > 1.):
+        if np.any(cube_content > 1.) or np.any(cube_content < 0.):
             return np.nan_to_num(-np.inf)
 
         if rank != 0: