Replace FX_UINT with unsigned int

fpdfsdk/formfiller/cffl_combobox.cpp

Index: fpdfsdk/formfiller/cffl_combobox.cpp
diff --git a/fpdfsdk/formfiller/cffl_combobox.cpp b/fpdfsdk/formfiller/cffl_combobox.cpp
index 448b0d94b9e350e0933bae3870fd5f56d10cbabb..40e5c346b26dc3a96e4bf54b433495b6f869d670 100644
--- a/fpdfsdk/formfiller/cffl_combobox.cpp
+++ b/fpdfsdk/formfiller/cffl_combobox.cpp
@@ -74,8 +74,8 @@ CPWL_Wnd* CFFL_ComboBox::NewPDFWindow(const PWL_CREATEPARAM& cp,
 }
 
 FX_BOOL CFFL_ComboBox::OnChar(CPDFSDK_Annot* pAnnot,
-                              FX_UINT nChar,
-                              FX_UINT nFlags) {
+                              uint32_t nChar,
+                              uint32_t nFlags) {
   return CFFL_FormFiller::OnChar(pAnnot, nChar, nFlags);
 }