Fixed missing conversion. The element absence returns null, but the c…

…orrect value to send back is an empty string. It was fixed in CatalogSchemaHandler but not here.

git-svn-id: https://olap4j.svn.sourceforge.net/svnroot/olap4j/trunk@118 c6a108a4-781c-0410-a6c6-c2d559e19af0

src/org/olap4j/driver/xmla/XmlaOlap4jConnection.java

@@ -1143,7 +1143,7 @@ public void handle(Element row, Context context, List<XmlaOlap4jSchema> list) th
  list.add(
  new XmlaOlap4jSchema(
  context.getCatalog(row),
- schemaName));
+ (schemaName == null) ? "" : schemaName));
  }
  }