Fix default thumbnail bug in CThumbsView

Author: zenden2k

Source/Gui/Controls/ThumbsView.cpp

@@ -173,7 +173,7 @@ void CThumbsView::MyDeleteAllItems()
         SimpleDelete(i, false);
     }
     DeleteAllItems();
-    clearImageList();
+    imageList_.SetImageCount(1);
 }
 
 bool CThumbsView::SimpleDelete(int ItemIndex, bool DeleteThumb, bool deleteFile)
@@ -804,11 +804,6 @@ void CThumbsView::getThumbnail(int itemIndex) {
     thumbQueueCondition_.notify_one();
 }
 
-void CThumbsView::clearImageList() {
-    // Default thumbnail (index=0) will be regenerated in AddImage()
-    imageList_.RemoveAll();
-}
-
 void CThumbsView::beginAdd() {
     batchAdd_ = true;
     SetRedraw(FALSE);

Source/Gui/Controls/ThumbsView.h

@@ -109,7 +109,6 @@ class CThumbsView :
     CImageViewItem getNextImgViewItem(const CImageViewItem& currentItem) override;
     CImageViewItem getPrevImgViewItem(const CImageViewItem& currentItem) override;
     void getThumbnail(int itemIndex);
-    void clearImageList();
     void beginAdd();
     void endAdd();
 protected: