am 4f1d7656: Merge change I741a6100 into eclair

Merge commit '4f1d765699b1be320d49530313b750a4d153a0bb' into eclair-mr2

* commit '4f1d765699b1be320d49530313b750a4d153a0bb':
  Fix bug where dirty messages for allocations attached to programVertex objects could be lost.