patch 9.0.1522: some functions give two error messages

Problem:    Some functions give two error messages.
Solution:   Do not give a second error message. (closes #12352)
diff --git a/src/version.c b/src/version.c
index 454e246..b24277d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1522,
+/**/
     1521,
 /**/
     1520,