virsh: fixed incorrect timing report

When executing virsh -t <command> the reported timing was off
by 3 orders of magnitude if the command took more than one
second.
Signed-off-by: NViktor Mihajlovski <mihajlov@linux.vnet.ibm.com>

tools/virsh.c

@@ -1509,7 +1509,7 @@ vshCommandRun(vshControl *ctl, const vshCmd *cmd)
             return ret;
 
         if (enable_timing) {
-            double diff_ms = (((after.tv_sec - before.tv_sec) * 1000000.0) +
+            double diff_ms = (((after.tv_sec - before.tv_sec) * 1000.0) +
                               ((after.tv_usec - before.tv_usec) / 1000.0));
 
             vshPrint(ctl, _("\n(Time: %.3f ms)\n\n"), diff_ms);