Relax the assert in SkReadBuffer::setPictureVersion().

Relax the assert in SkReadBuffer::setPictureVersion().

I'm hitting this with SkPictureShader serialization because there can be
multiple pictures deserialized from the same buffer.

I think we can relax the assert to allow setting the same version
multiple times.

(Alternatively, we could guard all the callers - but since setting the
same version is a no-op, that seems overkill)

R=mtklein@google.com, reed@google.com

Committed: https://code.google.com/p/skia/source/detail?r=14089

[mtklein, 2014-04-08 14:03:32]

On 2014/04/08 13:26:36, Florin Malita wrote:

lgtm

[reed1, 2014-04-08 14:11:13]

lgtm

[commit-bot: I haz the power, 2014-04-08 14:11:22]

CQ is trying da patch. Follow status at
https://skia-tree-status.appspot.com/cq/fmalita@chromium.org/226743004/1

[f(malita), 2014-04-08 14:11:33]

Committed patchset #1 manually as r14089 (presubmit successful).