fixed undo for opening/closing sidebar for pdf/web/text. fixed lightboxview for pdf's with smaller heights.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/client/views/DocumentDecorations.tsx b/src/client/views/DocumentDecorations.tsx
index c55daca3f..780dcfb6d 100644
--- a/src/client/views/DocumentDecorations.tsx
+++ b/src/client/views/DocumentDecorations.tsx
@@ -494,7 +494,9 @@ export class DocumentDecorations extends React.Component<{ PanelWidth: number; P
                     if (fixedAspect) {
                         if ((Math.abs(dW) > Math.abs(dH) && ((!dragBottom && !dragTop) || !modifyNativeDim)) || dragRight) {
                             if (dragRight && modifyNativeDim) {
-                                doc._nativeWidth = (actualdW / (doc._width || 1)) * Doc.NativeWidth(doc);
+                                if (Doc.NativeWidth(doc)) {
+                                    doc._nativeWidth = (actualdW / (doc._width || 1)) * Doc.NativeWidth(doc);
+                                }
                             } else {
                                 if (!doc._fitWidth) {
                                     actualdH = (nheight / nwidth) * actualdW;