(clear_storage, expand_assignment, store_{expr,constructor}): Use ptr_mode instead of Pmode in some places.

(clear_storage, expand_assignment, store_{expr,constructor}): Use ptr_mode
instead of Pmode in some places.
(expand_expr, expand_builtin): Likewise.
(push_block, store_expr): Convert size to Pmode.
(expand_expr, case ADDR_EXPR): Convert from Pmode to ptr_mode.

From-SVN: r9305