patch 8.2.3328: Coverity error for not checking return value

Problem:    Coverity error for not checking return value.
Solution:   Check value is not negative.

src/version.c

@@ -755,6 +755,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3328,
 /**/
     3327,
 /**/