temporarily changed the way how PT::Date is escaped

git-svn-id: svn://ttmath.org/publicrep/morm/trunk@1084 e52654a7-88a9-db11-a3e9-0013d4bc506e

src/baseexpression.cpp

@@ -329,7 +329,11 @@ void BaseExpression::esc(void* val, PT::TextStream & stream)
 
 void BaseExpression::esc(const PT::Date & date, PT::TextStream & stream)
 {
-	stream << date;
+	//stream << date;
+
+	// temporarily
+	// we need to send a form which is acceptable by Gson
+	date.SerializeYearMonthDay(stream);
 }