Set the correct cursor when starting

XFixes only reports cursor changes. We must manually call
XFixesGetCursorImage() when starting.
diff --git a/unix/x0vncserver/XDesktop.h b/unix/x0vncserver/XDesktop.h
index cc513a0..bc0648c 100644
--- a/unix/x0vncserver/XDesktop.h
+++ b/unix/x0vncserver/XDesktop.h
@@ -74,6 +74,7 @@
   unsigned ledState;
   const unsigned short *codeMap;
   unsigned codeMapLen;
+  bool setCursor();
 };
 
 #endif // __XDESKTOP_H__