Remove FD on close.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2207 c046a42c-6fe2-441c-8c8c-71466251a162

vl.c

@@ -1228,6 +1228,11 @@ static void fd_chr_read(void *opaque)
     if (len == 0)
         return;
     size = read(s->fd_in, buf, len);
+    if (size == 0) {
+        /* FD has been closed. Remove it from the active list.  */
+        qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
+        return;
+    }
     if (size > 0) {
         s->fd_read(s->fd_opaque, buf, size);
     }