Create two new exceptions:  IndentationError and TabError.  These are
used for indentation related errors.  This patch includes Ping's
improvements for indentation-related error messages.

Closes SourceForge patches #100734 and #100856.
diff --git a/Parser/parser.h b/Parser/parser.h
index 6087373..d0df8cf 100644
--- a/Parser/parser.h
+++ b/Parser/parser.h
@@ -38,7 +38,8 @@
 
 parser_state *PyParser_New(grammar *g, int start);
 void PyParser_Delete(parser_state *ps);
-int PyParser_AddToken(parser_state *ps, int type, char *str, int lineno);
+int PyParser_AddToken(parser_state *ps, int type, char *str, int lineno,
+                      int *expected_ret);
 void PyGrammar_AddAccelerators(grammar *g);
 
 #ifdef __cplusplus