fix build against older kernel-headers

git-svn-id: file:///home/bas/coolstream_public_svn/THIRDPARTY/applications/neutrino-experimental@910 e54a6e83-5905-42d5-8d5c-058d10e6a962

src/driver/streamts.cpp

@@ -13,6 +13,11 @@
 #include <poll.h>
 #include <syscall.h>
 
+/* work around for building with old kernel headers */
+#ifndef POLLRDHUP
+#define POLLRDHUP 0
+#endif
+
 #ifdef HAVE_CONFIG_H
 #include <config.h>
 #endif