* c-common.c (type_for_mode): Only return TItype nodes when
        HOST_BITS_PER_WIDE_INT is >= 64 bits.
        * c-decl.c (intTI_type_node, unsigned_intTI_type_node): Only declare
        when HOST_BITS_PER_WIDE_INT is >= 64 bits.
        (init_decl_processing): Only create TItype nodes when
        HOST_BITS_PER_WIDE_INT is >= 64 bits.
        * c-tree.h (intTI_type_node, unsigned_intTI_type_node): Only declare
        when HOST_BITS_PER_WIDE_INT is >= 64 bits.

From-SVN: r22912