patch 9.1.0858: Coverity complains about dead code

Problem:  Coverity complains about dead code
          (after v9.1.0852)
Solution: adjust #ifdef FEAT_CLIPBOARD

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index 5c775b0..bb0de39 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    858,
+/**/
     857,
 /**/
     856,