[KimDaBa] Patch to improve thumbnail cache handling

[Robert L Krawitz]

The following patch improves the handling of the thumbnail cache by
clearing it if the thumbnail size changes.  I believe I may have
already sent this one in.
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diff -ru kimdaba-2005-01-02-old/kimdaba/thumbnail.cpp kimdaba-2005-01-02-noi18n/kimdaba/thumbnail.cpp
--- kimdaba-2005-01-02-old/kimdaba/thumbnail.cpp	2005-01-02 15:38:10.000000000 -0500
+++ kimdaba-2005-01-02-noi18n/kimdaba/thumbnail.cpp	2005-01-08 19:31:51.002463848 -0500
@@ -208,7 +208,13 @@
 QPixmapCache& ThumbNail::pixmapCache()
 {
     static QPixmapCache cache;
+    static int lastSize = -1;
     cache.setCacheLimit( 4* 1024 );
+    int currentThumbSize = Options::instance()->thumbSize();
+    if (lastSize != currentThumbSize) {
+        cache.clear();
+        lastSize = currentThumbSize;
+    }
     return cache;
 }
 
@@ -220,7 +226,10 @@
 
     int size = Options::instance()->thumbSize();
     ImageManager::instance()->load( _imageInfo->fileName(),  const_cast<ThumbNail*>( this ), _imageInfo->angle(), size, size, true, false );
-    return emptyPixmap();
+    if ((pix = pixmapCache().find( _imageInfo->fileName())) != NULL)
+        return pix;
+    else
+        return emptyPixmap();
 }
 
 QPixmap* ThumbNail::emptyPixmap()