Fix PHP 7 issue
- Bump PORTREVISION
Obtained from: https://github.com/bobosch/gallery2/commit/4ddfafa416ffe5babd95f2a6532742c3ec903275
https://github.com/bobosch/gallery2/commit/4fc50203a12b78217999df00759d70d283efce2f
PR: 234557
Submitted by: Matthew Luckie <mjl@luckie.org.nz>