Fix unsafe type narrowing

Appending the warning below:
qBittorrent\src\base/utils/version.h(176): warning C4267: 'argument': conversion from 'size_t' to 'int', possible loss of data
qBittorrent\src\base/utils/version.h(185): note: see reference to function template instantiation 'std::array<T,2> Utils::Version<T,2,2>::parseList<StringsList>(const StringsList &)' being compiled
        with
        [
            T=unsigned short,
            StringsList=QList<QByteArray>
        ]

src/base/utils/version.h

@@ -168,12 +168,12 @@ namespace Utils
         {
             if ((static_cast<std::size_t>(versionParts.size()) > N)
                 || (static_cast<std::size_t>(versionParts.size()) < Mandatory))
-                throw std::runtime_error ("Incorrect number of version components");
+                throw std::runtime_error("Incorrect number of version components");
 
             bool ok = false;
             ComponentsArray res {{}};
             for (std::size_t i = 0; i < static_cast<std::size_t>(versionParts.size()); ++i) {
-                res[i] = static_cast<T>(versionParts[i].toInt(&ok));
+                res[i] = static_cast<T>(versionParts[static_cast<typename StringsList::size_type>(i)].toInt(&ok));
                 if (!ok)
                     throw std::runtime_error("Can not parse version component");
             }