patch 7.4.1718

Problem:    Coverity: not using return value of set_ref_in_item().
Solution:   Use the return value.

src/version.c

@@ -748,6 +748,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1718,
 /**/
     1717,
 /**/