patch 7.4.1522
Problem:    Cannot write channel err to a buffer.
Solution:   Implement it.
diff --git a/src/version.c b/src/version.c
index 5d7a968..0c0e5bd 100644
--- a/src/version.c
+++ b/src/version.c
@@ -744,6 +744,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1522,
+/**/
     1521,
 /**/
     1520,