varray.h: Allow compilation with a C++ compiler.

        * varray.h: Allow compilation with a C++ compiler.
        (union varray_data_tag): Prefix all field names with "vdt_".
        (VARRAY_CHAR, VARRAY_UCHAR, VARRAY_SHORT, VARRAY_USHORT,
        VARRAY_INT, VARRAY_UINT, VARRAY_LONG, VARRAY_ULONG,
        VARRAY_WIDE_INT, VARRAY_UWIDE_INT, VARRAY_GENERIC_PTR,
        VARRAY_GENERIC_PTR_NOGC, VARRAY_CHAR_PTR, VARRAY_RTX,
        VARRAY_RTVEC, VARRAY_TREE, VARRAY_BITMAP, VARRAY_REG, VARRAY_BB,
        VARRAY_ELT_LIST, VARRAY_EDGE, VARRAY_TREE_PTR): Adjust definition.
        (VARRAY_PUSH_CHAR, VARRAY_PUSH_UCHAR, VARRAY_PUSH_SHORT,
        VARRAY_PUSH_USHORT, VARRAY_PUSH_INT, VARRAY_PUSH_UINT, 
        VARRAY_PUSH_LONG, VARRAY_PUSH_ULONG, VARRAY_PUSH_WIDE_INT, 
        VARRAY_PUSH_UWIDE_INT, VARRAY_PUSH_GENERIC_PTR, 
        VARRAY_PUSH_GENERIC_PTR_NOGC, VARRAY_PUSH_CHAR_PTR, 
        VARRAY_PUSH_RTX, VARRAY_PUSH_RTVEC, VARRAY_PUSH_TREE, 
        VARRAY_PUSH_BITMAP, VARRAY_PUSH_REG, VARRAY_PUSH_BB, 
        VARRAY_PUSH_EDGE, VARRAY_PUSH_TREE_PTR): Likewise.
        (VARRAY_TOP_CHAR, VARRAY_TOP_UCHAR, VARRAY_TOP_SHORT, 
        VARRAY_TOP_USHORT, VARRAY_TOP_INT, VARRAY_TOP_UINT, 
        VARRAY_TOP_LONG, VARRAY_TOP_ULONG, VARRAY_TOP_WIDE_INT, 
        VARRAY_TOP_UWIDE_INT, VARRAY_TOP_GENERIC_PTR, 
        VARRAY_TOP_GENERIC_PTR_NOGC, VARRAY_TOP_CHAR_PTR, VARRAY_TOP_RTX, 
        VARRAY_TOP_RTVEC, VARRAY_TOP_TREE, VARRAY_TOP_BITMAP, 
        VARRAY_TOP_REG, VARRAY_TOP_BB, VARRAY_TOP_EDGE, 
        VARRAY_TOP_TREE_PTR): Likewise.
        * varray.c (varray_grow): Likewise.
        (varray_clear): Likewise.

From-SVN: r108399