patch 8.2.5137: cannot build without the +channel feature

Problem:    Cannot build without the +channel feature. (Dominique Pellé)
Solution:   Add #ifdef around ch_log() calls. (closes #10598)
diff --git a/src/version.c b/src/version.c
index 4678544..584d9e1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -735,6 +735,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    5137,
+/**/
     5136,
 /**/
     5135,