i18nblocks.module PostgreSQL patch

Hello,

First of all, thanks for this great piece of code.

Please find attached a patch fixing a quote issue.
In table i18n_blocks, delta is a varchar, therefore it should be quoted.

Instead of:
SELECT ibid FROM i18n_blocks WHERE delta = 8

One should write:
SELECT ibid FROM i18n_blocks WHERE delta = '8'

Under PostgreSQL, this makes an error.

The attached patch fixes this issue.
Please apply.

Kind regards,
Jean-Michel