allow rfbInitSockets with non-ready states.

This allows for reinitializations of e. g. sockets in a SHUTDOWN state.
The only state that doesn't make sense to reinitialize are READY states.

libvncserver/sockets.c

@@ -122,8 +122,9 @@ rfbInitSockets(rfbScreenInfoPtr rfbScreen)
 {
     in_addr_t iface = rfbScreen->listenInterface;
 
-    if (rfbScreen->socketState!=RFB_SOCKET_INIT)
-	return;
+    if (rfbScreen->socketState == RFB_SOCKET_READY) {
+        return;
+    }
 
     rfbScreen->socketState = RFB_SOCKET_READY;