[KPhotoAlbum] Couple of more small patches

[Robert L Krawitz]

The second one simply fixes a typo (looks like it was my typo).  The
first one prevents the image from flashing if you're stepping through
images faster than the caching system can load them.

Index: Viewer/DisplayArea.cpp
===================================================================
--- Viewer/DisplayArea.cpp      (revision 563616)
+++ Viewer/DisplayArea.cpp      (working copy)
@@ -412,6 +412,10 @@
 {
     if ( !_cachedView ) // Cached views are always full views
         zoom( QPoint(0,0), QPoint( _loadedImage.width(), _loadedImage.height() ) );
+    else {
+      _zStart = QPoint(0,0);
+      _zEnd = QPoint( _loadedImage.width(), _loadedImage.height() );
+    }
     _lastZoomType = ZoomFull;
 }
 
Index: Viewer/ViewerWidget.cpp
===================================================================
--- Viewer/ViewerWidget.cpp     (revision 563616)
+++ Viewer/ViewerWidget.cpp     (working copy)
@@ -405,7 +405,7 @@
 
 void Viewer::ViewerWidget::showNext1000()
 {
-    showNextN(100);
+    showNextN(1000);
 }
 
 void Viewer::ViewerWidget::showPrevN(int n)