Use proper default values when calling variable_get()

Hello,

I stumbled on this issue for quite a long time, even if it was trivial.
The values displayed by the "Embed inline" filter configuration form when it has never been submitted are not the ones used as default values in calls to variable_get().

This leads to misunderstanding, when the user sees some values on the form (but doesn't submit it, because it looks OK), but the filter can't work because these values are not set.
(And more when, as in my current project, you write an install profile which sets only the values you want to modify).

I suggest using proper default values in each call to variable_get() inside eminline module.

Patch on 6.x-1.20 is attached.

Regards,

David