patch 8.1.1415: build error in MS-Windows GUI

Problem:    Build error in MS-Windows GUI.
Solution:   Fix the LALLOC_MULT() argument.
diff --git a/src/version.c b/src/version.c
index c955bbb..eac5b02 100644
--- a/src/version.c
+++ b/src/version.c
@@ -768,6 +768,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1415,
+/**/
     1414,
 /**/
     1413,