[BUGFIX] Fix source collection for GIFBUILDER

If the file resource is a GIFBUILDER object, the dimension is set in the
properties XY, maxWidth or maxHeight.

Change-Id: Ic931760a966e6647042bca976c48e7bbaabdbb5a
Resolves: #77577
Releases: master, 8.7
Reviewed-on: https://review.typo3.org/49537


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Łukasz Uznański <l.uznanski@macopedia.pl>
Reviewed-by: Tomas Norre Mikkelsen <tomasnorre@gmail.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Susanne Moog <susanne.moog@typo3.org>