patch 7.4.1690
Problem:    Can't compile with the conceal feature but without multi-byte.
Solution:   Adjust #ifdef. (Owen Leibman)
diff --git a/src/version.c b/src/version.c
index 8d32e2a..3fa82ca 100644
--- a/src/version.c
+++ b/src/version.c
@@ -749,6 +749,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1690,
+/**/
     1689,
 /**/
     1688,