[Backport] Avoid undefined interface warning msvc

[t-b]

Undefine interface for Microsoft Visual Studio version 14.0.25431.01 Update 3
comming with _MSC_VER = 1900 to fix compilation error:
"error C2236: unexpected token 'struct'. Did you forget a ';'?

[mliszcz]

@t-b do you know why we undefine interface only for msvc versions >= 1900? Maybe we could drop this #if completely.

[t-b]

@mliszcz interface is only a define for MSVC 1900 or later. The mid-term solution for tango-9-lts would probably be to rename the struct member and drop the #ifdef.