Only call gen_requires once.

[Daniel J Walsh <dwalsh@redhat.com>]

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Currently audit2allow/sepolgen will create two identical gen_requires
block if you have allow rules and a role statement.

This patch fixes this problem.

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diff --exclude-from=exclude -N -u -r nsasepolgen/src/sepolgen/policygen.py policycoreutils-2.0.55/sepolgen-1.0.13/src/sepolgen/policygen.py
--- nsasepolgen/src/sepolgen/policygen.py	2008-08-28 09:34:24.000000000 -0400
+++ policycoreutils-2.0.55/sepolgen-1.0.13/src/sepolgen/policygen.py	2008-09-11 09:26:52.000000000 -0400
@@ -134,6 +134,10 @@
             m.refpolicy = False
 
     def get_module(self):
+        # Generate the requires
+        if self.gen_requires:
+            gen_requires(self.module)
+
         """Return the generated module"""
         return self.module
 
@@ -163,18 +167,10 @@
         # Generate the raw allow rules from the filtered list
         self.__add_allow_rules(raw_allow)
 
-        # Generate the requires
-        if self.gen_requires:
-            gen_requires(self.module)
-
     def add_role_types(self, role_type_set):
         for role_type in role_type_set:
             self.module.children.append(role_type)
 
-        # Generate the requires
-        if self.gen_requires:
-            gen_requires(self.module)
-
 def explain_access(av, ml=None, verbosity=SHORT_EXPLANATION):
     """Explain why a policy statement was generated.
 

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