Socket: Add missing noexcept specifier to LastWSAError()

This is used within a noexcept function, so it needs the noexcept
specifier.

lib/Socket.cpp

@@ -108,7 +108,7 @@ void Socket::setRemoteSocket(int remSocket) noexcept {
 }
 
 #ifdef _WIN32
-Socket::EResult Socket::LastWSAError() {
+Socket::EResult Socket::LastWSAError() noexcept {
   switch (WSAGetLastError()) {
   case WSAEWOULDBLOCK:
   case WSAEALREADY: