[PATCH 0/1] MR7492: winegstreamer: Expand GST_ELEMENT_REGISTER* defines.

[Brendan McGrath (＠redmcg)]

These defines were only introduced to GStreamer in version 1.20; thus
compiling against earlier versions causes a compilation error.

This commit replaces the defines with their respective expansions.

-- 
https://gitlab.winehq.org/wine/wine/-/merge_requests/7492