[gnumeric] fix criticals in ODF export

[Andreas J. Guelzow <guelzow src gnome org>]

commit e87f3c04dda09b404575adc4dc0132ef3714b3ed
Author: Andreas J. Guelzow <aguelzow pyrshep ca>
Date:   Sat May 16 01:37:31 2009 -0600

    fix criticals in ODF export
    
    2009-05-15  Andreas J. Guelzow <aguelzow pyrshep ca>
    
    	* openoffice-write.c (odf_write_cell): watch for empty rendered
    	  strings
---
 plugins/openoffice/ChangeLog          |    5 +++++
 plugins/openoffice/openoffice-write.c |   12 ++++++++----
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/plugins/openoffice/ChangeLog b/plugins/openoffice/ChangeLog
index 94d6356..a23c18d 100644
--- a/plugins/openoffice/ChangeLog
+++ b/plugins/openoffice/ChangeLog
@@ -1,5 +1,10 @@
 2009-05-15  Andreas J. Guelzow <aguelzow pyrshep ca>
 
+	* openoffice-write.c (odf_write_cell): watch for empty rendered 
+	  strings
+	
+2009-05-15  Andreas J. Guelzow <aguelzow pyrshep ca>
+
 	* openoffice-write.c (gnm_xml_out_add_hex_color): new
 	(odf_write_style): write more aspects of this style
 
diff --git a/plugins/openoffice/openoffice-write.c b/plugins/openoffice/openoffice-write.c
index 553702d..c569d59 100644
--- a/plugins/openoffice/openoffice-write.c
+++ b/plugins/openoffice/openoffice-write.c
@@ -358,7 +358,7 @@ odf_write_table_style (GnmOOExport *state,
 		sheet->visibility == GNM_SHEET_VISIBILITY_VISIBLE);
 	gsf_xml_out_add_cstr_unchecked (state->xml, STYLE "writing-mode",
 		sheet->text_is_rtl ? "rl-tb" : "lr-tb");
-	gsf_xml_out_end_element (state->xml); /* </style:properties> */
+	gsf_xml_out_end_element (state->xml); /* </style:table-properties> */
 
 	gsf_xml_out_end_element (state->xml); /* </style:style> */
 }
@@ -881,9 +881,13 @@ odf_write_cell (GnmOOExport *state, GnmCell *cell, GnmRange const *merge_range,
 			char *rendered_string = gnm_cell_get_rendered_text (cell);
 			gboolean white_written = TRUE;
 			
-			gsf_xml_out_start_element (state->xml, TEXT "p");
-			odf_add_chars (state, rendered_string, strlen (rendered_string), &white_written);
-			gsf_xml_out_end_element (state->xml);   /* p */
+			if (*rendered_string != '\0') {
+				gsf_xml_out_start_element (state->xml, TEXT "p");
+				odf_add_chars (state, rendered_string, 
+					       strlen (rendered_string), 
+					       &white_written);
+				gsf_xml_out_end_element (state->xml);   /* p */
+			}
 			
 			g_free (rendered_string);
 		} else if ((cell->value != NULL) && (VALUE_FMT (cell->value) != NULL)) {