Improve ODF roundtrip of conditional formats. [#726201]

2014-03-18  Andreas J. Guelzow <aguelzow@pyrshep.ca>

	* openoffice-read.c (h_align_is_valid): chnage type of field to int
	(odf_style_set_align_h): set alignment
	(oo_style_prop_cell): set h_align_is_valid