c_void is now anyopaque

[canadaduane]

I'm getting the following errors when compiling a project that uses pike:

/home/duane/Projects/cleartouch/lib/pike/os/windows.zig:35:25: error: use of undeclared identifier 'c_void'
        @ptrCast(*const c_void, &guid),
                        ^
/home/duane/Projects/cleartouch/lib/pike/os/windows/ws2_32.zig:82:21: error: use of undeclared identifier 'c_void'
    lpSendBuffer: ?*c_void,
                    ^

I believe c_void is now anyopaque. I think it may have been backported to zig 0.9.0? Not sure though.