Use hal to detect media types in halbackend

(cherry picked from commit 7fdec719a6)

kioslave/media/mediamanager/halbackend.cpp

@@ -595,19 +595,16 @@ void HALBackend::setVolumeProperties(Medium* medium)
         medium->setIconName(TQString::null);
 
         /* check if the disc id a vcd or a video dvd */
-        DiscType type = LinuxCDPolling::identifyDiscType(libhal_volume_get_device_file(halVolume));
+        if (libhal_device_get_property_bool(m_halContext, udi, "volume.disc.is_vcd", NULL)) {
-        switch (type)
-        {
-        case DiscType::VCD:
             mimeType = "media/vcd";
-            break;
+        }
-        case DiscType::SVCD:
+        else if (libhal_device_get_property_bool(m_halContext, udi, "volume.disc.is_svcd", NULL)) {
             mimeType = "media/svcd";
-            break;
+        }
-        case DiscType::DVD:
+        else if (libhal_device_get_property_bool(m_halContext, udi, "volume.disc.is_videodvd", NULL)) {
             mimeType = "media/dvdvideo";
-            break;
         }
+
     }
     else
     {