Commit 58c2577a3ff80e7416ef0434769e2af23365719c
2013-11-13T16:55:36
This enshrines the current testsuite practice of using ffi_arg for returned values. It would be reasonable and logical to use the actual return argument type as passed to ffi_prep_cif, but this would mean changing a large number of tests that use ffi_arg and all backends that write results to an ffi_arg.