Merge commit 'b7c8a1fbbd0b6ac0b096ef0402dee440ff27ecb7' into release/2.4
authorMichael Niedermayer <michaelni@gmx.at>
Sun, 29 Mar 2015 01:28:56 +0000 (03:28 +0200)
committerMichael Niedermayer <michaelni@gmx.at>
Sun, 29 Mar 2015 01:28:56 +0000 (03:28 +0200)
* commit 'b7c8a1fbbd0b6ac0b096ef0402dee440ff27ecb7':
  webp: ensure that each transform is only used once

See: c089e720c1b753790c746a13053636d7facf6bf0
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Trivial merge