updated for version 7.4.237
Problem:    When some patches was not included has("patch-7.4.123") may return
            true falsely.
Solution:   Check for the specific patch number.
diff --git a/src/version.c b/src/version.c
index 6b63fbc..7d3bde9 100644
--- a/src/version.c
+++ b/src/version.c
@@ -735,6 +735,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    237,
+/**/
     236,
 /**/
     235,