Fix typos in DynamicObjectView

The typos were introduced by [this commit](https://github.com/AnalyticalGraphicsInc/cesium/commit/f3d64d3a59695b6f990135e0ecaa51517e5a4b26) ([first one](https://github.com/AnalyticalGraphicsInc/cesium/commit/f3d64d3a59695b6f990135e0ecaa51517e5a4b26#L119L99) , [second one](https://github.com/AnalyticalGraphicsInc/cesium/commit/f3d64d3a59695b6f990135e0ecaa51517e5a4b26#L119L337))