[gnumeric] xml: protects a bit against bogus value types.

[Morten Welinder <mortenw src gnome org>]

commit b0e9137f084e561c957d7b1dd4a78b2a67667b99
Author: Morten Welinder <terra gnome org>
Date:   Thu Aug 5 14:08:04 2010 -0400

    xml: protects a bit against bogus value types.

 src/xml-sax-read.c |   12 +++++++++---
 1 files changed, 9 insertions(+), 3 deletions(-)
---
diff --git a/src/xml-sax-read.c b/src/xml-sax-read.c
index 0ff0085..7d0e9e5 100644
--- a/src/xml-sax-read.c
+++ b/src/xml-sax-read.c
@@ -2065,14 +2065,20 @@ xml_sax_cell_content (GsfXMLIn *xin, G_GNUC_UNUSED GsfXMLBlob *blob)
 		if (dummy)
 			gnm_expr_top_unref (dummy);
 	} else if (is_new_cell) {
+		GnmValue *v;
+
 		/*
 		 * Only set to empty if this is a new cell.
 		 * If it was created by a previous array
 		 * we do not want to erase it.
 		 */
-		gnm_cell_set_value (cell,
-				    value_new_from_string (value_type, "",
-							   NULL, FALSE));
+		v = value_new_from_string (value_type, "", NULL, FALSE);
+		if (!v) {
+			xml_sax_barf (G_STRFUNC, "v != NULL");
+			v = value_new_empty ();
+		}
+
+		gnm_cell_set_value (cell, v);
 	}
 
 	go_format_unref (value_fmt);