Improve declaration of _SNETUIDATA.selectnamecallback

Source/multi.cpp

@@ -834,7 +834,7 @@ int __fastcall NetInit(int bSinglePlayer, int *pfExitProgram)
 		UiData.authcallback = (void (__cdecl *)())UiAuthCallback;
 		UiData.getdatacallback = (void (__cdecl *)())UiGetDataCallback;
 		UiData.categorycallback = (void (__cdecl *)())UiCategoryCallback;
-		UiData.selectnamecallback = (void (__cdecl *)())mainmenu_select_hero_dialog;
+		UiData.selectnamecallback = mainmenu_select_hero_dialog;
 		UiData.changenamecallback = (void (__cdecl *)())mainmenu_create_hero;
 		UiData.profilebitmapcallback = UiProfileDraw;
 		UiData.profilecallback = UiProfileCallback;

structs.h

@@ -1367,7 +1367,7 @@ struct _SNETUIDATA
 	void (__cdecl *profilecallback)();
 	int profilefields;
 	void (__cdecl *profilebitmapcallback)();
-	void (__cdecl *selectnamecallback)();
+	int (__stdcall *selectnamecallback)(int u1, int u2, int u3, int u4, int mode, char *cname, int clen, char *cdesc, int cdlen, int *multi);
 	void (__cdecl *changenamecallback)();
 };