libvirtd.init.in: stop/restart() - wrong return value in case of failure

The function stop() was always returning 0 (OK) from killproc() even
in case of error.

AUTHORS

@@ -188,6 +188,7 @@ Patches have also been contributed by:
   Peter Krempa         <pkrempa@redhat.com>
   Nan Zhang            <nzhang@redhat.com>
   Wieland Hoffmann     <themineo@googlemail.com>
+  Douglas Schilling Landgraf <dougsland@redhat.com>
 
   [....send patches to get your name here....]
 

daemon/libvirtd.init.in

@@ -76,6 +76,8 @@ stop() {
         rm -f @localstatedir@/lock/subsys/$SERVICE
         rm -f $PIDFILE
         rm -rf @localstatedir@/cache/libvirt/*
+    else
+        exit $RETVAL
     fi
 }