Sparse fixes: NULL use, header order, ANSI prototypes, static

Fix Sparse warnings:
 * use NULL instead of plain 0
 * rearrange header include order to avoid redefining types accidentally
 * ANSIfy SLIRP
 * avoid "restrict" keyword
 * add static



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6736 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/bt-vhci.c b/bt-vhci.c
index 5ab2ab8..ee90f10 100644
--- a/bt-vhci.c
+++ b/bt-vhci.c
@@ -165,5 +165,5 @@
     s->info->evt_recv = vhci_out_hci_packet_event;
     s->info->acl_recv = vhci_out_hci_packet_acl;
 
-    qemu_set_fd_handler(s->fd, vhci_read, 0, s);
+    qemu_set_fd_handler(s->fd, vhci_read, NULL, s);
 }