patch 9.0.0974: even when Esc is encoded a timeout is used

Problem:    Even when Esc is encoded a timeout is used.
Solution:   Use K_ESC when an encoded Esc is found.
diff --git a/src/version.c b/src/version.c
index 8a64672..6e206df 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    974,
+/**/
     973,
 /**/
     972,