--- a/absyntax/absyntax.cc	Wed Feb 01 13:01:08 2012 +0000
+++ b/absyntax/absyntax.cc	Wed Feb 01 19:49:11 2012 +0000
@@ -61,6 +61,7 @@
   this->last_line    = last_line;
   this->last_column  = last_column;
   this->last_order   = last_order;
+  this->datatype     = NULL;
 }