Added a reset for the Engine's internal images array

[ramondelafuente]

The engine currently keeps a hash of path => data presumably to allow optimizing for header/footer images on multilpe pages.

We are using the PHPdf library with the Symfony Bundle. We wrote a console command that runs forever, and generates single-page PDF's in a loop. Each page has a QR code, which get generated on disk in the same loop cycle.

With the current Engine, we have two options, both problematic:

• If we use the same filename for the QR code images, only the first image wll ever be loaded from disk
• If we use different filenames for the QR code images, all images will remain in the Engine memory and never be cleared.

This patch simply clears the internal Images array on reset().

[verschoof]

@psliwa can you consider this PR?
👍

[psliwa]

Yes, of course. Thanks @ramondelafuente for PR. I've marged that PR manually, because I wanted to merge it also to 1.2.x branch: b82a5d4

[ramondelafuente]

Nice! Thanks for the quick response.

[ramondelafuente]

Will you be making a new tag/release soon?

[psliwa]

Ok, I've created 1.2.5 tag with that fix.