Minor fix to pandas Surface conversion
Minor fix to pandas Surface conversion

vascotenner/holoviews,vascotenner/holoviews,ioam/holoviews,vascotenner/holoviews,basnijholt/holoviews,mjabri/holoviews,basnijholt/holoviews,ioam/holoviews,basnijholt/holoviews,mjabri/holoviews,ioam/holoviews,mjabri/holoviews