[antlr-interest] Small Bug

[Robert Colquhoun]

Hi,

I just noticed a small inefficiency in the generated parser code, antlr was 
creating a method like:

     protected void buildTokenTypeASTClassMap() {
         tokenTypeToASTClassMap = new Hashtable();
         tokenTypeToASTClassMap=null;
     };

The problem is in the antlr.JavaCodeGenerator.getTokenASTNodeMap(), 
attached is a version of JavaCodeGenerator which creates:

    protected void buildTokenTypeASTClassMap() {
         tokenTypeToASTClassMap=null;
     };

PS For some reason the first method caused kaffe, which i dont normally 
use, to crash!

  - Robert
 

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