File: Use std::time_t to store timestamp

Signed-off-by: Hugo Beauzée-Luyssen <hugo@beauzee.fr>

src/File.cpp

@@ -114,7 +114,7 @@ IFile::Type File::type() const
 
 unsigned int File::lastModificationDate() const
 {
-    return m_lastModificationDate;
+    return static_cast<unsigned int>( m_lastModificationDate );
 }
 
 unsigned int File::size() const

src/File.h

@@ -127,7 +127,7 @@ private:
     // or the full file MRL for non removable ones
     std::string m_mrl;
     Type m_type;
-    unsigned int m_lastModificationDate;
+    std::time_t m_lastModificationDate;
     unsigned int m_size;
     ParserStep m_parserSteps;
     int64_t m_folderId;