Use smaller type

src/base/rss/rss_item.cpp

@@ -36,7 +36,7 @@
 
 using namespace RSS;
 
-const QString Item::PathSeparator("\\");
+const QChar Item::PathSeparator('\\');
 
 Item::Item(const QString &path)
     : m_path(path)

src/base/rss/rss_item.h

@@ -58,7 +58,7 @@ namespace RSS
 
         virtual QJsonValue toJsonValue(bool withData = false) const = 0;
 
-        static const QString PathSeparator;
+        static const QChar PathSeparator;
 
         static bool isValidPath(const QString &path);
         static QString joinPath(const QString &path1, const QString &path2);