memory leak fix (Juergen Keil)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1067 c046a42c-6fe2-441c-8c8c-71466251a162

slirp/if.c

@@ -315,6 +315,8 @@ if_start(void)
 	/* Encapsulate the packet for sending */
         if_encap(ifm->m_data, ifm->m_len);
 
+        m_free(ifm);
+
 	if (if_queued)
 	   goto again;
 }