patch 8.0.0977: cannot send lines to a terminal job on MS-Windows

Problem:    Cannot send lines to a terminal job on MS-Windows.
Solution:   Set jv_in_buf.  Command doesn't get EOF yet though.
diff --git a/src/version.c b/src/version.c
index c191dc7..432849f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    977,
+/**/
     976,
 /**/
     975,