tree_io.ads (ASIS_Version_Number): Update because of the changes made in front-end

2008-05-26  Sergey Rybin  <rybin@adacore.com>

	* tree_io.ads (ASIS_Version_Number): Update because of the changes
	made in front-end

From-SVN: r135950

gcc/ada/tree_io.ads

@@ -46,7 +46,7 @@ package Tree_IO is
    Tree_Format_Error : exception;
    --  Raised if a format error is detected in the input file
 
-   ASIS_Version_Number : constant := 22;
+   ASIS_Version_Number : constant := 23;
    --  ASIS Version. This is used to check for consistency between the compiler
    --  used to generate trees and an ASIS application that is reading the
    --  trees. It must be incremented whenever a change is made to the tree