patch 7.4.1386

Problem:    When the Job exit callback is invoked, the job may be freed too
            soon. (Yasuhiro Matsumoto)
Solution:   Increase refcount.

src/version.c

@@ -748,6 +748,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1386,
 /**/
     1385,
 /**/