Make sure that wxwidgets uses the gtk2 version of the toolkit

Trying to fix an assert from src/wx/guiinit.cpp:2058

src/wx/CMakeLists.txt

@@ -34,6 +34,8 @@ endif(ENABLE_OPENAL)
 # adv is for wxAboutBox
 # xml, html is for xrc
 SET( wxWidgets_USE_LIBS xrc xml html adv gl net core base )
+#Make sure we use the libwxgtk2.8 toolkit
+set(wxWidgets_CUSTOM_OPTIONS "--toolkit=gtk2")
 FIND_PACKAGE ( wxWidgets REQUIRED )
 EXECUTE_PROCESS(COMMAND sh "${wxWidgets_CONFIG_EXECUTABLE}" --cxxflags)
 INCLUDE( ${wxWidgets_USE_FILE} )