[PING c, c++, fortran, treelang] remove signed(_or_unsigned)?_type langhooks

[Rafael Espindola]

Now the only parts of the patch
(http://gcc.gnu.org/ml/gcc-patches/2007-06/msg00313.html)  that are
missing approval are:

       * gcc/cp/cp-objcp-common.h (LANG_HOOKS_SIGNED_TYPE): Remove.
       (LANG_HOOKS_SIGNED_OR_UNSIGNED_TYPE): Remove.

       * gcc/fortran/trans-types.c (gfc_signed_type): Remove.
       * gcc/fortran/trans-types.h (gfc_signed_type): Remove.
       * gcc/fortran/f95-lang.c (LANG_HOOKS_SIGNED_TYPE): Remove.

       * gcc/treelang/treetree.c (tree_lang_signed_type): Remove.
       (LANG_HOOKS_SIGNED_TYPE): Remove.

       * gcc/c-objc-common.h (LANG_HOOKS_SIGNED_TYPE): Remove.
       (LANG_HOOKS_SIGNED_OR_UNSIGNED_TYPE): Remove.
       * gcc/c-common.c (same_scalar_type_ignoring_signedness): Use
       c_common_signed_type instead of lang_hooks.types.signed_type.

--

Rafael Avila de Espindola

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