Merge "fix bug 3477451 Bogus asserts with pure compute scripts."

Context::PushState::PushState(Context *con) {

    mRsc = con;

    if (con->mIsGraphicsContext) {

        mFragment.set(con->getProgramFragment());

        mVertex.set(con->getProgramVertex());

        mStore.set(con->getProgramStore());

        mRaster.set(con->getProgramRaster());

        mFont.set(con->getFont());

    }

}

Context::PushState::~PushState() {

    if (mRsc->mIsGraphicsContext) {

        mRsc->setProgramFragment(mFragment.get());

        mRsc->setProgramVertex(mVertex.get());

        mRsc->setProgramStore(mStore.get());

        mRsc->setProgramRaster(mRaster.get());

        mRsc->setFont(mFont.get());

    }

}

uint32_t Context::runScript(Script *s) {