=== modified file 'storage/myisam/mi_check.c'
--- storage/myisam/mi_check.c	2013-02-27 15:33:55 +0000
+++ storage/myisam/mi_check.c	2013-06-25 02:31:36 +0000
@@ -4270,13 +4270,15 @@
   /* Copy the column definitions */
   memcpy((uchar*) recdef,(uchar*) share.rec,
 	 (size_t) (sizeof(MI_COLUMNDEF)*(share.base.fields+1)));
-  for (rec=recdef,end=recdef+share.base.fields; rec != end ; rec++)
+  if (unpack && !(share.options & HA_OPTION_PACK_RECORD))
   {
-    if (unpack && !(share.options & HA_OPTION_PACK_RECORD) &&
-	rec->type != FIELD_BLOB &&
-	rec->type != FIELD_VARCHAR &&
-	rec->type != FIELD_CHECK)
-      rec->type=(int) FIELD_NORMAL;
+    for (rec=recdef,end=recdef+share.base.fields; rec != end ; rec++)
+    {
+      if (rec->type != FIELD_BLOB &&
+  	rec->type != FIELD_VARCHAR &&
+  	rec->type != FIELD_CHECK)
+        rec->type=(int) FIELD_NORMAL;
+    }
   }
 
   /* Change the new key to point at the saved key segments */