--- a/absyntax/absyntax.cc	Tue Jun 05 11:10:12 2012 +0200
+++ b/absyntax/absyntax.cc	Tue Jun 05 19:17:29 2012 +0200
@@ -62,6 +62,10 @@
   this->last_column  = last_column;
   this->last_order   = last_order;
   this->datatype     = NULL;
+  this->const_value_real     = NULL;
+  this->const_value_integer  = NULL;
+  this->const_value_uinteger = NULL;
+  this->const_value_bool     = NULL;
 }