updated for version 7.4.447

Problem:    Spell files from Hunspell may generate a lot of errors.
Solution:   Add the IGNOREEXTRA flag.

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    447,
 /**/
     446,
 /**/