Return bool rather than bitwise-and for FX_BOOL

xfa/fwl/basewidget/fwl_listboximp.cpp

Index: xfa/fwl/basewidget/fwl_listboximp.cpp
diff --git a/xfa/fwl/basewidget/fwl_listboximp.cpp b/xfa/fwl/basewidget/fwl_listboximp.cpp
index dd017e215ff5741351aa9e54ee4711ee4c2941c8..d514f7e1e31e323907d6139c43303286d0de3071 100644
--- a/xfa/fwl/basewidget/fwl_listboximp.cpp
+++ b/xfa/fwl/basewidget/fwl_listboximp.cpp
@@ -399,14 +399,11 @@ void CFWL_ListBoxImp::ClearSelection() {
   for (int32_t i = 0; i < iCount; i++) {
     FWL_HLISTITEM hItem = pData->GetItem(m_pInterface, i);
     uint32_t dwState = pData->GetItemStyles(m_pInterface, hItem);
-    FX_BOOL bFindSel = dwState & FWL_ITEMSTATE_LTB_Selected;
-    if (!bFindSel) {
+    if (!(dwState & FWL_ITEMSTATE_LTB_Selected))
       continue;
-    }
     SetSelectionDirect(hItem, FALSE);
-    if (!bMulti) {
+    if (!bMulti)
       return;
-    }
   }
 }
 void CFWL_ListBoxImp::SelectAll() {