trans-expr.c (gfc_conv_missing_dummy, [...]): Replace calls to convert on constant integer nodes by build_int_cst.

	* trans-expr.c (gfc_conv_missing_dummy, gfc_conv_unary_op,
	gfc_conv_cst_int_power, gfc_conv_string_tmp,
	gfc_conv_function_call): Replace calls to convert on constant
	integer nodes by build_int_cst.
	* trans-stmt.c (gfc_trans_do): Likewise.
	* trans-io.c (set_internal_unit, transfer_namelist_element):
	Likewise.
	* trans-decl.c (build_entry_thunks): Likewise.

From-SVN: r114868