Invalidate IPWL_FocusHandler and IPWL_Provider on destruction.

fpdfsdk/src/formfiller/FFL_ComboBox.cpp

Index: fpdfsdk/src/formfiller/FFL_ComboBox.cpp
diff --git a/fpdfsdk/src/formfiller/FFL_ComboBox.cpp b/fpdfsdk/src/formfiller/FFL_ComboBox.cpp
index b2c32f38fc2cfdfaf2a7ae151c324585cf160f01..49505e196a78347e393f02fece73bb83b139233e 100644
--- a/fpdfsdk/src/formfiller/FFL_ComboBox.cpp
+++ b/fpdfsdk/src/formfiller/FFL_ComboBox.cpp
@@ -21,6 +21,10 @@ CFFL_ComboBox::CFFL_ComboBox(CPDFDoc_Environment* pApp, CPDFSDK_Annot* pAnnot)
 }
 
 CFFL_ComboBox::~CFFL_ComboBox() {
+  for (auto& it : m_Maps) {

[Tom Sepez, 2016/01/06 19:58:25]

nit: const auto?

[Lei Zhang, 2016/01/06 22:08:38]

Done.

+    CPWL_Wnd* pWnd = it.second;

[Tom Sepez, 2016/01/06 19:58:26]

nit: local not needed.

[Lei Zhang, 2016/01/06 22:08:38]

Done.

+    pWnd->InvalidateFocusHandler(this);
+  }
   delete m_pFontMap;
 }