Bison 2.7 compatibility.

	* src/parse/libparse.cc (parse::parse): Do not copy the parser
	instance.

src/parse/libparse.cc

 //
 // This file is part of Nolimips, a MIPS simulator with unlimited registers
-// Copyright (C) 2003, 2004 Benoit Perrot <benoit@lrde.epita.fr>
+// Copyright (C) 2003, 2004, 2013 Benoit Perrot <benoit@lrde.epita.fr>
 //
 // Nolimips is free software; you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
@@ -45,7 +45,7 @@ namespace parse
     program_builder.set_nop_after_branch(nop_after_branch_p);
 
     std::string dummy(filename);
-    yy::parser parser = yy::parser(dummy, program_builder);
+    yy::parser parser(dummy, program_builder);
     parser.set_debug_level(trace_parse_p);
 
     scan_open(filename, trace_scan_p);