Introduce and use ScConditionalFormatList::empty() instead of size()

Change-Id: If42fdfbcac74ef2a04bd5d006272a5c1a4f510e2
Reviewed-on: https://gerrit.libreoffice.org/61804Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Jenkins

sc/inc/conditio.hxx

@@ -650,6 +650,7 @@ public:
     const_iterator end() const;
 
     size_t size() const;
+    bool empty() const;
 
     void erase(sal_uLong nIndex);
     void clear();

sc/source/core/data/conditio.cxx

@@ -2246,6 +2246,11 @@ size_t ScConditionalFormatList::size() const
     return m_ConditionalFormats.size();
 }
 
+bool ScConditionalFormatList::empty() const
+{
+    return m_ConditionalFormats.empty();
+}
+
 void ScConditionalFormatList::erase( sal_uLong nIndex )
 {
     for( iterator itr = begin(); itr != end(); ++itr )

sc/source/ui/condformat/condformatmgr.cxx

@@ -57,7 +57,7 @@ void ScCondFormatManagerWindow::Init()
 
     SetUpdateMode(true);
 
-    if (mpFormatList && mpFormatList->size())
+    if (mpFormatList && !mpFormatList->empty())
         SelectRow(0);
 }
 
@@ -146,7 +146,7 @@ std::unique_ptr<ScConditionalFormatList> ScCondFormatManagerDlg::GetConditionalF
 
 void ScCondFormatManagerDlg::UpdateButtonSensitivity()
 {
-    OUString aNewSensitivity = mpFormatList->size() ? OUString("true") : OUString("false");
+    OUString aNewSensitivity = mpFormatList->empty() ? OUString("false") : OUString("true");
     m_pBtnRemove->set_property("sensitive", aNewSensitivity);
     m_pBtnEdit->set_property("sensitive", aNewSensitivity);
 }