Add mimeTypePtrFast method to KFileItem

This relates to Bug 699
Clean up a couple of minor build warnings
Classify usbmisc devices
(cherry picked from commit 54578ce023)

kio/kfile/kfiledetailview.cpp

@@ -360,13 +360,13 @@ void KFileDetailView::slotSortingChanged( int col )
 
     switch( col ) {
         case COL_NAME:
-            sortSpec = (sort & ~TQDir::SortByMask | TQDir::Name);
+            sortSpec = ((sort & ~TQDir::SortByMask) | TQDir::Name);
             break;
         case COL_SIZE:
-            sortSpec = (sort & ~TQDir::SortByMask | TQDir::Size);
+            sortSpec = ((sort & ~TQDir::SortByMask) | TQDir::Size);
             break;
         case COL_DATE:
-            sortSpec = (sort & ~TQDir::SortByMask | TQDir::Time);
+            sortSpec = ((sort & ~TQDir::SortByMask) | TQDir::Time);
             break;
 
         // the following columns have no equivalent in TQDir, so we set it

kio/kfile/kfileiconview.cpp

@@ -611,7 +611,7 @@ void KFileIconView::slotPreviewResult( KIO::Job *job )
 void KFileIconView::gotPreview( const KFileItem *item, const TQPixmap& pix )
 {
     KFileIconViewItem *it = viewItem( item );
-    if ( it )
+    if ( it ) {
         if( item->overlays() & KIcon::HiddenOverlay )
         {
             TQPixmap p( pix );
@@ -619,8 +619,10 @@ void KFileIconView::gotPreview( const KFileItem *item, const TQPixmap& pix )
             KIconEffect::semiTransparent( p );
             it->setPixmap( p );
         }
-        else
+        else {
             it->setPixmap( pix );
+        }
+    }
 }
 
 bool KFileIconView::canPreview( const KFileItem *item ) const

kio/kio/kfileitem.cpp

@@ -531,6 +531,11 @@ TQString KFileItem::mimetypeFast() const
 	}
 }
 
+KMimeType::Ptr KFileItem::mimeTypePtrFast()
+{
+	return m_pMimeType;
+}
+
 KMimeType::Ptr KFileItem::determineMimeType()
 {
 	if ( !m_pMimeType || !m_bMimeTypeKnown )

kio/kio/kfileitem.h

@@ -320,6 +320,14 @@ public:
    */
   TQString mimetypeFast() const;
 
+  /**
+   * Returns the mimetype of the file item.
+   * If @p _determineMimeTypeOnDemand was used in the constructor, this will return
+   * the mimetype as fast as possible at the expense of accuracy.
+   * @return the fast mime type
+   */
+  KMimeType::Ptr mimeTypePtrFast();
+
   /**
    * Returns the mimetype of the file item.
    * If _determineMimeTypeOnDemand was used in the constructor, this will determine