patch 9.0.1757: ex_class() function is too long

Problem:  ex_class() function is too long
Solution: refactor it

closes: #12858

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Yegappan Lakshmanan <yegappan@yahoo.com>
diff --git a/src/version.c b/src/version.c
index bc3ddc1..781d389 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1757,
+/**/
     1756,
 /**/
     1755,