Fix crash when a user removes a formula when its preview is being generated. (Another signal/destructor/gcc3 bug)

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/branches/BRANCH_1_5_X@19666 a592a061-630c-0410-9148-cb99ea01b6c8

src/insets/RenderPreview.cpp

@@ -62,6 +62,13 @@ RenderPreview::RenderPreview(RenderPreview const & other,
 {}
 
 
+RenderPreview::~RenderPreview()
+{
+	if (ploader_connection_.connected())
+		ploader_connection_.disconnect();
+}
+
+
 auto_ptr<RenderBase> RenderPreview::clone(Inset const * inset) const
 {
 	return auto_ptr<RenderBase>(new RenderPreview(*this, inset));

src/insets/RenderPreview.h

@@ -49,6 +49,7 @@ public:
 
 	RenderPreview(Inset const *);
 	RenderPreview(RenderPreview const &, Inset const *);
+	~RenderPreview();
 	std::auto_ptr<RenderBase> clone(Inset const *) const;
 
 	/// Compute the size of the object, returned in dim

status.15x

@@ -70,6 +70,9 @@ What's new
 - Fix crash when a user removes the underlying figure of a graphic inset
   that has been copied and pasted (Bug 4108).
 
+- Fix crash when a user removes a formula when its preview is being generated.
+  (gcc 3 only).
+
 * DOCUMENTATION
 
 - Embedded Objects manual: section about longtable alignment added