Make API visible cubeb_device_info members and cubeb_devid const.

The API user is never permitted to modify these (nor deallocate them
directly, which non-const can imply), so they should marked const in the
public definition.

I suspect this happened originally because free()ing the
cubeb_device_info members requires casting const away in
cubeb_device_info_destroy, but other than being slightly ugly there's no
problem doing that and it's better to have the public API be consistent.

This also allows fixing the const-ness of utf8_to_wstr and wstr_to_utf8
const in cubeb_wasapi.cpp.

1 files changed, 4 insertions, 4 deletions

diff --git a/src/cubeb.c b/src/cubeb.c
index e0375c3..6a32029 100644
--- a/src/cubeb.c
+++ b/src/cubeb.c
@@ -514,10 +514,10 @@ int cubeb_device_info_destroy(cubeb_device_info * info)
     return CUBEB_ERROR_INVALID_PARAMETER;
   }
 
-  free(info->device_id);
-  free(info->friendly_name);
-  free(info->group_id);
-  free(info->vendor_name);
+  free((void *) info->device_id);
+  free((void *) info->friendly_name);
+  free((void *) info->group_id);
+  free((void *) info->vendor_name);
 
   free(info);
   return CUBEB_OK;