patch 7.4.1258

Problem:    The channel test can fail if messages arrive later.
Solution:   Add a short sleep. (Jun T.)

src/version.c

@@ -742,6 +742,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1258,
 /**/
     1257,
 /**/