don't ignore errors in readlink

myisam/mi_open.c

@@ -142,9 +142,8 @@ MI_INFO *mi_open(const char *name, int mode, uint open_flags)
       goto err;
     }
     /* Don't call realpath() if the name can't be a link */
-    if (strcmp(name_buff, org_name))
-      (void) my_readlink(index_name, org_name, MYF(0));
-    else
+    if (strcmp(name_buff, org_name)  ||
+        my_readlink(index_name, org_name, MYF(0)) == -1)
       (void) strmov(index_name, org_name);
     (void) fn_format(data_name,org_name,"",MI_NAME_DEXT,2+4+16);