Fix Diff's common start / end detection

diff --git a/wcfsetup/install/files/lib/util/Diff.class.php b/wcfsetup/install/files/lib/util/Diff.class.php
index a4d51a8c0b85172a3e506755ef01616cfd92bcbd..f296fc64a400438890e496ffb3f9bf188c46d226 100644 (file)
--- a/wcfsetup/install/files/lib/util/Diff.class.php
+++ b/wcfsetup/install/files/lib/util/Diff.class.php
@@ -88,7 +88,7 @@ class Diff {
                }
                
                // both arrays are the same
-               if ($offsetStart === $offsetEnd) {
+               if ($offsetStart === $this->sizeA && $offsetStart === $this->sizeB) {
                        return \SplFixedArray::fromArray($this->a);
                }