patch 8.2.3668: messages may be corrupted

Problem:    Messages may be corrupted.
Solution:   Use another buffer instead of IObuff. (Yegappan Lakshmanan,
            closes #9195)

src/version.c

@@ -757,6 +757,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3668,
 /**/
     3667,
 /**/