patch 9.0.0834: warning for missing return type

Problem:    Warning for missing return type.
Solution:   Add "int". (San James, closes #11496)
diff --git a/src/version.c b/src/version.c
index e852ea1..9a8928c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    834,
+/**/
     833,
 /**/
     832,