Type Mismatch

I am using Schema and Schema views because I want to ensure that everything going into my database is clean as possible. I don't know that I have need of this module, but conceive that it may be useful, so I added it in.

In domain_blocks.install there is the following line in function domain_blocks_schema():

'delta' => array('type' => 'varchar', 'length' => '32', 'not null' => TRUE, 'default' => 0),

This causes admin/reports/status to show 1 warning in the Database schema section of the report. The warning is:

domain_blocks.delta is type varchar but its default 0 is PHP type integer

The error is corrected by changing the offending line to:

'delta' => array('type' => 'varchar', 'length' => '32', 'not null' => TRUE, 'default' => '0'),

Now I notice in the module file some code is looking at delta as a bool. I went to the PHP documentation to verify, and the text '0' is treated as false just as the int value of 0 is.

http://php.net/manual/en/language.types.boolean.php under Converting to boolean shows this to be the case.

If the default value of '0' is only meant to be used as a boolean FALSE, this should work without causing any other problems in the code.

However, I am not certain that this code change may not cause other problems, although my inclination is to think that it will not. I have never used git to create a patch, but am planning on trying to do so -- this will be my first patch to Drupal if I can figure it out, and I'd like to try to do this. If someone else beats me to it, oh well. If I do submit this patch, please make sure I have not done something wrong. I will try and be very thorough, but I am a rank neophyte at this...