Fix Travis Build

Missing wx includes.

src/toolbars/SelectionBar.cpp

@@ -40,9 +40,11 @@ with changes in the SelectionBar.
 #include <wx/settings.h>
 #include <wx/sizer.h>
 #include <wx/valtext.h>
+#include <wx/stattext.h>
 #endif
 #include <wx/statline.h>
 
+
 #include "SelectionBarListener.h"
 #include "SelectionBar.h"
 

src/toolbars/SelectionBar.h

@@ -23,6 +23,7 @@ class wxCommandEvent;
 class wxDC;
 class wxRadioButton;
 class wxSizeEvent;
+class wxStaticText;
 
 class SelectionBarListener;
 class NumericTextCtrl;