More native look for wxSpinButton.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@19883 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/motif/spinbutt.cpp

@@ -225,6 +225,8 @@ bool wxArrowButton::Create( wxSpinButton* parent, wxWindowID id,
     AttachWidget( parent, m_mainWidget, (WXWidget) NULL,
                   pos.x, pos.y, size.x, size.y );
 
+    SetForegroundColour( parent->GetBackgroundColour() );
+
     return TRUE;
 }