libvncserver: fix fallback Latin1 sending in rfbSendServerCutTextUTF8()

Author: bk138

src/libvncserver/rfbserver.c

@@ -4051,9 +4051,9 @@ rfbSendServerCutTextUTF8(rfbScreenInfoPtr rfbScreen,char *str, int len, char *fa
     iterator = rfbGetClientIterator(rfbScreen);
     while ((cl = rfbClientIteratorNext(iterator)) != NULL) {
         sct.type = rfbServerCutText;
-        sct.length = Swap32IfLE(len);
         LOCK(cl->sendMutex);
         if (cl->enableExtendedClipboard) {
+            sct.length = Swap32IfLE(len);
             if (cl->extClipboardData != NULL) {
                 free(cl->extClipboardData);
                 cl->extClipboardData = NULL;
@@ -4081,6 +4081,7 @@ rfbSendServerCutTextUTF8(rfbScreenInfoPtr rfbScreen,char *str, int len, char *fa
             }
             UNLOCK(cl->sendMutex);
         } else if (fallbackLatin1Str != NULL) {
+            sct.length = Swap32IfLE(latin1Len);
             if (rfbWriteExact(cl, (char *)&sct,
                         sz_rfbServerCutTextMsg) < 0) {
                 rfbLogPerror("rfbSendServerCutText: write");