 the same for all pix; 0 otherwise  * \param[out]   pmaxw   [optional] max width of all pix  * \param[out]   pmaxh   [optional] max height of all pix  * \return  0 if OK, 0 on error  *  * <pre>  * Notes:  *      (0) It is considered to be an error if there are no pix.  * </pre>  */ l_ok pixaVerifyDimensions(PIXA     *pixa,                      l_int00  *psame,                      l_int00  *pmaxw,                      l_int00  *pmaxh) { l_int00  i, n, w, h, maxw, maxh, same