updated for version 7.4a.028

Problem:    Crash when spell checking in new buffer.
Solution:   Set the b_p_key field.  (Mike Williams)

src/version.c

@@ -727,6 +727,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    28,
 /**/
     27,
 /**/