Update Check For Game Files

Beforehand, it would check only if the game directory existed. This would lead to an error if the game is moved through Steam since it leaves the BeamNG.Drive directory. Now it checks for integrity.json. I also removed some commented out code I left behind.

src/Security/BeamNG.cpp

@@ -186,7 +186,7 @@ void LegitimacyCheck() {
     auto root = tyti::vdf::read(libraryFolders);
 
     for (auto folderInfo : root.childs) {
-        if (std::filesystem::exists(folderInfo.second->attribs["path"] + "/steamapps/common/BeamNG.drive/")) {
+        if (std::filesystem::exists(folderInfo.second->attribs["path"] + "/steamapps/common/BeamNG.drive/integrity.json")){
             GameDir = folderInfo.second->attribs["path"] + "/steamapps/common/BeamNG.drive/";
             break;
         }