patch 8.2.4194: MS-Windows: code for calculating font size is duplicated

Problem:    MS-Windows: code for calculating font size is duplicated.
Solution:   Move the code to a function. (Ken Takata, closes #9603)
diff --git a/src/version.c b/src/version.c
index a5bb606..5eacff8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4194,
+/**/
     4193,
 /**/
     4192,