Add missing "static"

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5184 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/vl.c b/vl.c
index 0a457a9..c20091a 100644
--- a/vl.c
+++ b/vl.c
@@ -8210,7 +8210,7 @@
     qemu_system_shutdown_request();
 }
 
-void termsig_setup(void)
+static void termsig_setup(void)
 {
     struct sigaction act;