am 5572b3af: Replace assert with error message

    // see if the GraphicBuffer reference was null, which should only ever

    // happen for EOS.

    if (codecBuffer.mGraphicBuffer == NULL) {

        CHECK(mEndOfStream && mEndOfStreamSent);

        if (!(mEndOfStream && mEndOfStreamSent)) {

            // This can happen when broken code sends us the same buffer

            // twice in a row.

            ALOGE("ERROR: codecBufferEmptied on non-EOS null buffer "

                    "(buffer emptied twice?)");

        }

        // No GraphicBuffer to deal with, no additional input or output is

        // expected, so just return.

        return;