dialog: do not open dialog centered at 0x0

Character Editor[skill]: do not always display help, there is an help button...

src/dialogxml/dialogs/dialog.cpp

@@ -536,8 +536,8 @@ void cDialog::run(std::function<void(cDialog&)> onopen){
 	view.setViewport(sf::FloatRect(0, 0, ui_scale, ui_scale));
 	win.setView(view);
 
-	// ASAN overflow
-	win.setPosition({parentPos.x + (int(parentSz.x) - wWidth) / 2, parentPos.y + (int(parentSz.y) - wHeight) / 2});
+	win.setPosition({std::max(0,parentPos.x + (int(parentSz.x) - wWidth) / 2),
+			std::max(0,parentPos.y + (int(parentSz.y) - wHeight) / 2)});
 	draw();
 	makeFrontWindow(parent ? parent-> win : mainPtr);
 	makeFrontWindow(win);

src/pcedit/pc.editors.cpp

@@ -634,8 +634,6 @@ bool spend_xp(short pc_num, short mode, cDialog* parent) {
 	xpDlog.attachClickHandlers(std::bind(spend_xp_navigate_filter,_1,_2,std::ref(save)),{"keep","cancel","left","right","help"});
 	xpDlog.attachClickHandlers(spend_xp_filter,{"sp-m","sp-p","hp-m","hp-p"});
 	
-	give_help(10,11,xpDlog);
-	
 	xpDlog.run();
 	
 	return xpDlog.getResult<bool>();