init sockets in main function, otherwise the installer window doesn't work if...

init sockets in main function, otherwise the installer window doesn't work if updates were not checked first

src/gui/update_checker.cpp

@@ -142,7 +142,6 @@ void check_updates() {
 }
 
 void check_updates_now(bool async) {
-	wxSocketBase::Initialize();
 	if (async) {
 		CheckUpdateThread* thread = new CheckUpdateThread;
 		thread->Create();

src/main.cpp

@@ -26,6 +26,7 @@
 #include <wx/fs_inet.h>
 #include <wx/wfstream.h>
 #include <wx/txtstrm.h>
+#include <wx/socket.h>
 
 // ----------------------------------------------------------------------------- : Main function/class
 
@@ -82,6 +83,7 @@ int MSE::OnRun() {
 		#endif
 		wxInitAllImageHandlers();
 		wxFileSystem::AddHandler(new wxInternetFSHandler); // needed for update checker
+		wxSocketBase::Initialize();
 		init_script_variables();
 		init_file_formats();
 		cli.init();