Fixed ulong constant not being accepted with an unchecked cast to long.

Fixed the argument passed to Substring. Java expects a position but C# expects a length.

csjavacc/parser/LexGen.java

@@ -666,7 +666,7 @@ public class LexGen extends CSJavaCCGlobals implements CSJavaCCParserConstants{
          ostr.print("static long[] jjtoToken = {");
          for (i = 0; i < maxOrdinal / 64 + 1; i++){
             if (i % 4 == 0)ostr.print("\n   ");
-            ostr.print("0x" + Long.toHexString(toToken[i]) + "L, ");
+            ostr.print("unchecked((long)0x" + Long.toHexString(toToken[i]) + "L), ");
          }
          ostr.println("\n};");
       }