patch 9.0.1593: MS-Windows: assert error when compiled with debug mode

Problem:    MS-Windows: assert error when compiled with debug mode.
Solution:   Adjust arguments to setvbuf(). (Ken Takata, closes #12467)
diff --git a/src/version.c b/src/version.c
index 45e5b58..3f0eb0d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1593,
+/**/
     1592,
 /**/
     1591,