Wordpress image quality

[DaveG43]

thanks for creating BFI_Thumb it works really well.

Using the following code as described in the readme in wordpress throws an error of "Undefined variable: quality, etc"
if ( has_post_thumbnail()) {
the_post_thumbnail( array( 560, 300, 'bfi_thumb' => true ) );
}
This error happens when the thumbnail is generated. It does not show again upon refreshing the page.
Setting the quality like this fixes the issue.
if ( has_post_thumbnail()) {
the_post_thumbnail( array( 560, 300, 'quality' => 80, 'bfi_thumb' => true ) );
}

Is it possible to set a default of '75' or something like that in case no quality parameter is set?

Thanks