making dynare++ code compatible with Bison 2.7. Fixes #461

dynare++/parser/cc/csv_parser.cpp

@@ -14,7 +14,7 @@ CSVParser* csv_parser;
  * csv_tab.cc generated from csv.lex and csv.y. */
 void* csv__scan_buffer(char*, unsigned int);
 void csv__destroy_buffer(void*);
-void csv_parse();
+int csv_parse();
 
 extern ogp::location_type csv_lloc;
 

dynare++/parser/cc/formula_parser.cpp

@@ -110,7 +110,7 @@ FormulaParser* fparser;
  * formula_tab.cc generated from formula.lex and formula.y */
 void* fmla__scan_buffer(char*, size_t);
 void fmla__destroy_buffer(void*);
-void fmla_parse();
+int fmla_parse();
 extern location_type fmla_lloc; 
 
 /** This makes own copy of provided data, sets the buffer for the

dynare++/parser/cc/matrix_parser.cpp

@@ -18,7 +18,7 @@ MatrixParser* mparser;
  * matrix_tab.cc generated from matrix.lex and matrix.y. */
 void* matrix__scan_buffer(char*, size_t);
 void matrix__destroy_buffer(void*);
-void matrix_parse();
+int matrix_parse();
 extern ogp::location_type matrix_lloc;
 
 void MatrixParser::parse(int length, const char* stream)