This patch created automatically
Index: rtp.c
===================================================================
--- rtp.c	(revision 10461)
+++ rtp.c	(working copy)
@@ -435,6 +435,11 @@
 	static struct ast_frame *f;
 	struct rtpPayloadType rtpPT;
 	
+	if( !rtp ) {
+	    ast_log(LOG_ERROR, "ast_rtp_read(): called with rtp == NULL\n");
+	    return &null_frame;
+	}
+
 	len = sizeof(sin);
 	
 	/* Cache where the header will go */