add virtual destructor

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@4839 a592a061-630c-0410-9148-cb99ea01b6c8

diff --git a/src/graphics/PreviewedInset.h b/src/graphics/PreviewedInset.h
index 87baa3b9d978cc6cb2c9c046d6d0ec114995dd66..b7147478feda18704dd6a8dd9b5544bbce75bb1a 100644 (file)
--- a/src/graphics/PreviewedInset.h
+++ b/src/graphics/PreviewedInset.h
@@ -37,6 +37,8 @@ public:
 
        ///
        PreviewedInset(Inset & inset) : inset_(inset), pimage_(0) {}
+       ///
+       virtual ~PreviewedInset() {}
 
        /** Find the PreviewLoader, add a LaTeX snippet to it and
         *  start the loading process.