Replace FX_UINT with unsigned int

fpdfsdk/formfiller/cffl_pushbutton.cpp

Index: fpdfsdk/formfiller/cffl_pushbutton.cpp
diff --git a/fpdfsdk/formfiller/cffl_pushbutton.cpp b/fpdfsdk/formfiller/cffl_pushbutton.cpp
index 630b2d52d193e776fecd77bc77ac8586099a6af5..4b147fbfb1c9041731b2c060704e01ea8868f078 100644
--- a/fpdfsdk/formfiller/cffl_pushbutton.cpp
+++ b/fpdfsdk/formfiller/cffl_pushbutton.cpp
@@ -24,8 +24,8 @@ CPWL_Wnd* CFFL_PushButton::NewPDFWindow(const PWL_CREATEPARAM& cp,
 }
 
 FX_BOOL CFFL_PushButton::OnChar(CPDFSDK_Annot* pAnnot,
-                                FX_UINT nChar,
-                                FX_UINT nFlags) {
+                                uint32_t nChar,
+                                uint32_t nFlags) {
   return CFFL_FormFiller::OnChar(pAnnot, nChar, nFlags);
 }