Fix a typo.

plugins/sudoers/parse.h

@@ -181,8 +181,8 @@ struct userspec {
     struct member_list users;		/* list of users */
     struct privilege_list privileges;	/* list of privileges */
     struct comment_list comments;	/* optional comments */
-    int lineno;
-    char *file;
+    int lineno;				/* line number in sudoers */
+    char *file;				/* name of sudoers file */
 };
 
 /*