patch 7.4.1798

Problem:    Still compiler warning for unused return value. (Charles Campbell)
Solution:   Assign to ignoredp.

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1798,
 /**/
     1797,
 /**/