Add a note to document how the temporary 'pvt' should be initialized

before using it.
I am unclear on the details right now so i hope someone can comment
more. The obvious (and lazy) approach would be to bzero() all of it
(except for the string pool), but isn't that too much work ?
Feedback wanted here...



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@76313 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -6353,6 +6353,13 @@ static int transmit_response_using_temp(ast_string_field callid, struct sockaddr
 		return -1;
 	}
 
+	/* XXX the structure may be dirty from previous usage.
+	 * Here we should state clearly how we should reinitialize it
+	 * before using it.
+	 * E.g. certainly the threadstorage should be left alone,
+	 * but other thihngs such as flags etc. maybe need cleanup ?
+	 */
+	 
 	/* Initialize the bare minimum */
 	p->method = intended_method;