Add missing wxUSE_XXX checks to persistent adapters headers

Make sure these headers can be compiled even when the control they're
written for is not available in the build. Including them in this case
doesn't make much sense, of course, but not giving any errors is still
nicer and consistent with the rest of wx headers.

include/wx/persist/bookctrl.h

@@ -12,6 +12,8 @@
 
 #include "wx/persist/window.h"
 
+#if wxUSE_BOOKCTRL
+
 #include "wx/bookctrl.h"
 
 // ----------------------------------------------------------------------------
@@ -63,4 +65,6 @@ inline wxPersistentObject *wxCreatePersistentObject(wxBookCtrlBase *book)
     return new wxPersistentBookCtrl(book);
 }
 
+#endif // wxUSE_BOOKCTRL
+
 #endif // _WX_PERSIST_BOOKCTRL_H_

include/wx/persist/combobox.h

@@ -12,6 +12,8 @@
 
 #include "wx/persist/window.h"
 
+#if wxUSE_COMBOBOX
+
 #include "wx/combobox.h"
 
 #define wxPERSIST_COMBOBOX_KIND wxASCII_STR("Combobox")
@@ -96,4 +98,6 @@ inline wxPersistentObject *wxCreatePersistentObject(wxComboBox* combobox)
     return new wxPersistentComboBox(combobox);
 }
 
+#endif // wxUSE_COMBOBOX
+
 #endif // _WX_PERSIST_COMBOBOX_H_

include/wx/persist/dataview.h

@@ -12,6 +12,8 @@
 
 #include "wx/persist/window.h"
 
+#if wxUSE_DATAVIEWCTRL
+
 #include "wx/dataview.h"
 
 // ----------------------------------------------------------------------------
@@ -168,4 +170,6 @@ inline wxPersistentObject *wxCreatePersistentObject(wxDataViewCtrl* control)
     return new wxPersistentDataViewCtrl(control);
 }
 
+#endif // wxUSE_DATAVIEWCTRL
+
 #endif // _WX_PERSIST_DATAVIEW_H_

include/wx/persist/treebook.h

@@ -12,6 +12,8 @@
 
 #include "wx/persist/bookctrl.h"
 
+#if wxUSE_TREEBOOK
+
 #include "wx/arrstr.h"
 #include "wx/treebook.h"
 
@@ -93,4 +95,6 @@ inline wxPersistentObject *wxCreatePersistentObject(wxTreebook *book)
     return new wxPersistentTreeBookCtrl(book);
 }
 
+#endif // wxUSE_TREEBOOK
+
 #endif // _WX_PERSIST_TREEBOOK_H_