Added index error exception handling.

adminsortable/__init__.py

@@ -6,8 +6,11 @@ def get_version():
     version = '{0}.{1}'.format(VERSION[0], VERSION[1])
     if VERSION[2]:
         version = '{0}.{1}'.format(version, VERSION[2])
+    try:
         if VERSION[3]:
             version = '{0}.{1}'.format(version, VERSION[3])
+    except IndexError:
+        pass
     return version