vm: hide unwanted warnings from xenstore-read

appvm/qubes_core_appvm

@@ -60,7 +60,7 @@ start()
 		echo Back to life.
 	fi
 
-	start_meminfo_writer=$(/usr/bin/xenstore-read qubes-service/meminfo-writer)
+	start_meminfo_writer=$(/usr/bin/xenstore-read qubes-service/meminfo-writer 2>/dev/null)
 	if [ "$start_meminfo_writer" != "0" ]; then
 		MEM_CHANGE_THRESHOLD_KB=30000
 		MEMINFO_DELAY_USEC=100000

proxyvm/init.d/qubes_firewall

@@ -11,7 +11,7 @@ PIDFILE=/var/run/qubes/qubes_firewall.pid
 start()
 {
     type=$(/usr/bin/xenstore-read qubes_vm_type)
-    start_firewall=$(/usr/bin/xenstore-read qubes-service/qubes-firewall)
+    start_firewall=$(/usr/bin/xenstore-read qubes-service/qubes-firewall 2> /dev/null)
     if [ -z "$start_firewall" ] && [ "$type" == "ProxyVM" ] || [ "$start_firewall" == "1" ]; then
         echo -n $"Starting Qubes Firewall monitor:"
         /sbin/ethtool -K eth0 sg off

proxyvm/init.d/qubes_netwatcher

@@ -11,7 +11,7 @@ PIDFILE=/var/run/qubes/qubes_netwatcher.pid
 start()
 {
     type=$(/usr/bin/xenstore-read qubes_vm_type)
-    start_netwatcher=$(/usr/bin/xenstore-read qubes-service/qubes-netwatcher)
+    start_netwatcher=$(/usr/bin/xenstore-read qubes-service/qubes-netwatcher 2>/dev/null)
     if [ -z "$start_netwatcher" ] && [ "$type" == "ProxyVM" ] || [ "$start_netwatcher" == "1" ]; then
         echo -n $"Starting Qubes Network monitor:"
         /sbin/ethtool -K eth0 sg off