patch 8.1.0452: MS-Windows: not finding intl.dll

Problem:    MS-Windows: not finding intl.dll.
Solution:   Also find intl.dll next to libintl.dll. (Ken Takata)
diff --git a/src/version.c b/src/version.c
index a225cb9..b50ce81 100644
--- a/src/version.c
+++ b/src/version.c
@@ -793,6 +793,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    452,
+/**/
     451,
 /**/
     450,