patch 8.0.0969: Coverity warning for unused return value

Problem:    Coverity warning for unused return value.
Solution:   Add (void) to avoid the warning.

src/version.c

@@ -769,6 +769,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    969,
 /**/
     968,
 /**/