patch 7.4.1974
Problem:    GUI has a problem with some termcodes.
Solution:   Handle negative numbers. (Kazunobu Kuriyama)
diff --git a/src/version.c b/src/version.c
index 1e8e635..5ef04d0 100644
--- a/src/version.c
+++ b/src/version.c
@@ -754,6 +754,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1974,
+/**/
     1973,
 /**/
     1972,