fixed invalid received length

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1155 c046a42c-6fe2-441c-8c8c-71466251a162

slirp/socket.c

@@ -175,8 +175,12 @@ soread(so)
 	 * a close will be detected on next iteration.
 	 * A return of -1 wont (shouldn't) happen, since it didn't happen above
 	 */
-	if (n == 2 && nn == iov[0].iov_len)
-	   nn += recv(so->s, iov[1].iov_base, iov[1].iov_len,0);
+	if (n == 2 && nn == iov[0].iov_len) {
+            int ret;
+            ret = recv(so->s, iov[1].iov_base, iov[1].iov_len,0);
+            if (ret > 0)
+                nn += ret;
+        }
 	
 	DEBUG_MISC((dfd, " ... read nn = %d bytes\n", nn));
 #endif