Mario de Sousa <msousa@fe.up.pt> [Tue, 05 Apr 2011 19:42:33 +0100] rev 284
Fixing error message incorrectly changed in previous merge.
Mario de Sousa <msousa@fe.up.pt> [Tue, 05 Apr 2011 18:31:55 +0100] rev 283
fixing C code generation of return_statement_c and exit_statement_c