lalr1.cc: avoid GCC 4.3 warnings.

lalr1.cc: avoid GCC 4.3 warnings.

GCC 4.3 now warns about "a || b && c" and asks for explicit
parentheses.
Reported by Alexandre Duret-Lutz.
	* data/location.cc: Update copyright years.
	(Position::operator==): Use parens to make precedence explicit.
	Compare lines and columns first, as they are more likely to be
	different, and they are faster to compare.