Need to include os/print.h to use snprintf on Windows

git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4634 3789f03b-4d11-0410-bbf8-ca57d06f2519

common/rfb/JpegCompressor.cxx

@@ -21,6 +21,7 @@
 #include <rdr/Exception.h>
 #include <rfb/Rect.h>
 #include <rfb/PixelFormat.h>
+#include <os/print.h>
 
 using namespace rfb;