$NetBSD$

Fix for SA26157.

--- stream/realrtsp/real.c.orig	2009-08-09 15:48:11.000000000 +0300
+++ stream/realrtsp/real.c	2009-08-09 15:51:10.000000000 +0300
@@ -376,7 +376,10 @@
           ts, size, flags1, unknown1, header[4], header[5]);
 #endif
   size+=2;
-  
+ 
+  if (size < 12)
+	return 0;
+
   ph.object_version=0;
   ph.length=size;
   ph.stream_number=(flags1>>1)&0x1f;
