patch 7.4.2281

Problem:    Timer test fails sometimes.
Solution:   Reduce minimum time by 1 msec.

src/version.c

@@ -763,6 +763,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2281,
 /**/
     2280,
 /**/