Some optimizations on empty wxString comparison and on Search (Database)

src/view/GenerateDialog.cpp

@@ -146,7 +146,7 @@ void GenerateDialog::OnYearFromChange(wxCommandEvent& event)
 
   _monthFrom->Clear();
   
-  if (years == wxT("")) 
+  if (!years.Length()) 
     {
       _monthFrom->Append(wxT(""));
       return;
@@ -193,7 +193,7 @@ void GenerateDialog::OnOK(wxCommandEvent& event)
 {  
   int monthFrom, yearFrom, monthTo, yearTo, i;
 
-  if (_yearFrom->GetString(_yearFrom->GetCurrentSelection()) == wxT(""))
+  if (!_yearFrom->GetString(_yearFrom->GetCurrentSelection()).Length())
     {
       monthFrom = -1;
       yearFrom = -1;