patch 8.1.1301: when compiled with VIMDLL some messages are not shown

Problem:    When compiled with VIMDLL some messages are not shown.
Solution:   Set/reset gui.in_use and gui.starting as needed. (Ken Takata,
            closes #4361)
diff --git a/src/version.c b/src/version.c
index 7905cda..6f6456b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -768,6 +768,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1301,
+/**/
     1300,
 /**/
     1299,