patch 7.4.1779
Problem:    Using negative index in strcharpart(). (Yegappan Lakshmanan)
Solution:   Assume single byte when using a negative iindex.
diff --git a/src/version.c b/src/version.c
index 9aa400e..adbb46a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -754,6 +754,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1779,
+/**/
     1778,
 /**/
     1777,