patch 7.4.2256

Problem:    Coverity complains about null pointer check.
Solution:   Remove wrong and superfluous error check.

src/version.c

@@ -763,6 +763,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2256,
 /**/
     2255,
 /**/