osmo-sim-auth.py:45:9: E113 unexpected indentation

Change-Id: I0d7d34ea03f267bafc0da173c48440626e03d58b
diff --git a/osmo-sim-auth.py b/osmo-sim-auth.py
index 939dd40..30cf2dc 100755
--- a/osmo-sim-auth.py
+++ b/osmo-sim-auth.py
@@ -42,9 +42,9 @@
 
     print("\nUMTS Authentication")
     ret = u.authenticate(rand_bin, autn_bin, ctx='3G')
-        if ret == None:
-                print("UMTS Authentication failed")
-                exit(1)
+    if ret == None:
+        print("UMTS Authentication failed")
+        exit(1)
     if len(ret) == 1:
         print("AUTS:\t%s" % b2a_hex(byteToString(ret[0])))
     else: