patch 8.2.4255: theoretical computation overflow

Problem:    Theoretical computation overflow.
Solution:   Perform multiplication in a wider type. (closes #9657)
diff --git a/src/version.c b/src/version.c
index 25f858b..3e4072d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4255,
+/**/
     4254,
 /**/
     4253,