* call.c (standard_conversion): Add bad conversion between
        integers and pointers.
        (convert_like_real): Don't use convert_for_initialization for bad
        conversions; complain here and use cp_convert.
        (build_over_call): Don't handle bad conversions specially.
        (perform_implicit_conversion): Allow bad conversions.
        (can_convert_arg_bad): New fn.
        * cp-tree.h: Declare it.
        * typeck.c (convert_for_assignment): Use it.
        (ptr_reasonably_similar): Any target type is similar to void.

From-SVN: r46123