Matrix can not be modified

[zboing]

Hi and thank you for this library,
There is an issue on some phones (Samsung Galaxy S2 or OnePlus One).

java.lang.IllegalStateException: Matrix can not be modified
at android.graphics.Matrix$1.oops(Matrix.java:43)
at android.graphics.Matrix$1.postTranslate(Matrix.java:157)
at com.github.florent37.depth.view.core.DepthManager.calculateBounds(DepthManager.java:148)
atcom.github.florent37.depth.container.core.DepthContainerManager$1.onPreDraw(DepthContainerManager.java:59)