aa-autodep crashes when called with multiple parameters if profile already exists in active _and_ extra directory

After fixing bug 1378095, aa-autodep can still crash in rare cases

aa-autodep crashes if
- you call it with multiple parameters AND
- a profile (for example for sshd) exists in both /etc/apparmor.d/ AND the extra-profiles directory AND
- that profile contains hats

Reproducer:
- copy the sshd profile from the "inactive" dir to /etc/apparmor.d/
  (important: the profile has to contain hats!)
- run aa-autodep with multiple parameters:
      aa-autodep /bin/true /bin/false

This crash is caused by read_inactive_profiles() running multiple times, once for each parameter.

Proof-of-concept patch- fixes the problem, but I'm not sure if I want it as final solution:

=== modified file 'utils/apparmor/aa.py'
--- utils/apparmor/aa.py 2015-02-20 20:36:55 +0000
+++ utils/apparmor/aa.py 2015-02-20 22:48:43 +0000
@@ -2593,7 +2593,15 @@
             else:
                 read_profile(profile_dir + '/' + file, True)

+inactive_profiles_already_read = False
+
 def read_inactive_profiles():
+ global inactive_profiles_already_read
+ if inactive_profiles_already_read:
+ print("read_inactive_profiles called a second time, IGNORING")
+ return
+ inactive_profiles_already_read = True
+
     if not os.path.exists(extra_profile_dir):
         return None
     try: