Check if the pth is a valid directory before to look for icons.

rpcs3/rpcs3qt/main_window.cpp

@@ -158,6 +158,8 @@ void main_window::SetAppIconFromPath(const std::string path)
 	std::string path_list[] = { path, sstr(qpath.section("/", 0, -2)), sstr(qpath.section("/", 0, -3)) };
 	for (std::string pth : path_list)
 	{
+		if (!fs::is_dir(pth)) continue;
+
 		for (std::string ico : icon_list)
 		{
 			ico = pth + ico;