Add missing import statement.

mvousden · mvousden · commit 252c2d2cb678 · 2016-06-14T15:56:07.000+01:00
diff --git a/fidimag/atomistic/llg.py b/fidimag/atomistic/llg.py
@@ -8,6 +8,7 @@
 from fidimag.common.fileio import DataSaver
 from fidimag.common.save_vtk import SaveVTK
 import fidimag.common.constant as const
+import fidimag.common.skyrmion_number
 
 
 class LLG(object):
