audit: convert audit_ever_enabled to a boolean

We were treating it as a boolean, let's make it a boolean to help
avoid future mistakes.
Reviewed-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>

kernel/audit.c

@@ -86,7 +86,7 @@ static int	audit_initialized;
 #define AUDIT_ON	1
 #define AUDIT_LOCKED	2
 u32		audit_enabled = AUDIT_OFF;
-u32		audit_ever_enabled = !!AUDIT_OFF;
+bool		audit_ever_enabled = !!AUDIT_OFF;
 
 EXPORT_SYMBOL_GPL(audit_enabled);
 

kernel/audit.h

@@ -208,7 +208,7 @@ struct audit_context {
 	struct audit_proctitle proctitle;
 };
 
-extern u32 audit_ever_enabled;
+extern bool audit_ever_enabled;
 
 extern void audit_copy_inode(struct audit_names *name,
 			     const struct dentry *dentry,