[Patch] Initialization order

[Pavel Sanda]

hi,the following patch fixes this warning, i'll commit later if no objections.

insets/InsetCollapsable.h: In copy constructor 
'lyx::InsetCollapsable::InsetCollapsable(const lyx::InsetCollapsable&)':
insets/InsetCollapsable.h:174: warning: 'lyx::InsetCollapsable::button_dim' 
will be initialized after
insets/InsetCollapsable.h:167: warning:   'const lyx::InsetLayout* 
lyx::InsetCollapsable::layout_'
insets/InsetCollapsable.cpp:89: warning:   when initialized here

pavel

diff --git a/src/insets/InsetCollapsable.cpp b/src/insets/InsetCollapsable.cpp
index 3e6aab9..276b9f8 100644
--- a/src/insets/InsetCollapsable.cpp
+++ b/src/insets/InsetCollapsable.cpp
@@ -88,9 +88,9 @@ InsetCollapsable::InsetCollapsable(BufferParams const & bp,
 
 InsetCollapsable::InsetCollapsable(InsetCollapsable const & rhs)
        : InsetText(rhs),
-               button_dim(rhs.button_dim),
                layout_(rhs.layout_),
                labelstring_(rhs.labelstring_),
+               button_dim(rhs.button_dim),
                status_(rhs.status_),
                openinlined_(rhs.openinlined_),
                autoOpen_(rhs.autoOpen_),