avoid leaking allocated tooltips

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@60788 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/statusbar.cpp

@@ -153,6 +153,16 @@ wxStatusBar::~wxStatusBar()
     // occupy
     PostSizeEventToParent();
 
+    // delete existing tooltips
+    for (size_t i=0; i<m_tooltips.size(); i++)
+    {
+        if (m_tooltips[i])
+        {
+            delete m_tooltips[i];
+            m_tooltips[i] = NULL;
+        }
+    }
+
     wxDELETE(m_pDC);
 }
 
@@ -178,10 +188,13 @@ void wxStatusBar::SetFieldsCount(int nFields, const int *widths)
 
     // reset all current tooltips
     for (size_t i=0; i<m_tooltips.size(); i++)
+    {
+        if (m_tooltips[i])
         {
             delete m_tooltips[i];
             m_tooltips[i] = NULL;
         }
+    }
 
     // shrink/expand the array:
     m_tooltips.resize(m_panes.GetCount(), NULL);