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## 70_choose_tree.dpatch by William Alexander Grant <william.grant@ubuntu.com.au>
--- tv-0.5.orig/tview.cpp
+++ tv-0.5/tview.cpp
@@ -209,7 +209,7 @@
wxT("SVG vector picture files (*.svg)|*.svg"),
wxSAVE|wxOVERWRITE_PROMPT);
- if (dialog.ShowModal() == wxID_OK)
+ if ((dialog.ShowModal() == wxID_OK) && (p.GetNumTrees() != 0))
{
wxSVGFileDC pictureDC (dialog.GetPath(), 600, 650) ;
OnDraw (&pictureDC);
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