Surely this is Linux-only code

The initial commit in 2012 even says so, and nothing has changed it
since.

Feel free to fix more properly by making sure this code can be called
only on Linux..

Change-Id: Idb0a2b5594daa0cde7f4797b51ba3e5876170f9f

sfx2/source/dialog/bluthsnd.cxx

@@ -38,6 +38,9 @@ SfxBluetoothModel::SendMailResult SfxBluetoothModel::SaveAndSend( const css::uno
 
 SfxBluetoothModel::SendMailResult SfxBluetoothModel::Send( const css::uno::Reference< css::frame::XFrame >& /*xFrame*/ )
 {
+#ifndef LINUX
+    return SEND_MAIL_ERROR;
+#else
     char bthsend[300];
     SendMailResult eResult = SEND_MAIL_OK;
     OUString aFileName = maAttachedDocuments[0];
@@ -45,6 +48,7 @@ SfxBluetoothModel::SendMailResult SfxBluetoothModel::Send( const css::uno::Refer
     if( !system( bthsend ) )
         eResult = SEND_MAIL_ERROR;
     return eResult;
+#endif
 }
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */