patch 8.0.1308: the "Reading from stdin" message may be undesired

Problem:    The "Reading from stdin" message may be undesired and there is no
            easy way to skip it.
Solution:   Don't show the message with --not-a-term was used.
diff --git a/src/version.c b/src/version.c
index 276f4fb..c81d7a3 100644
--- a/src/version.c
+++ b/src/version.c
@@ -767,6 +767,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1308,
+/**/
     1307,
 /**/
     1306,