LibVNCClient: pass buffer as const to WriteToTLS()

libvncclient/tls.h

@@ -43,7 +43,7 @@ int ReadFromTLS(rfbClient* client, char *out, unsigned int n);
  * It's a wrapper function over gnutls_record_send() and it will be
  * blocking call, until all bytes are written or error returned.
  */
-int WriteToTLS(rfbClient* client, char *buf, unsigned int n);
+int WriteToTLS(rfbClient* client, const char *buf, unsigned int n);
 
 /* Free TLS resources */
 void FreeTLS(rfbClient* client);

libvncclient/tls_gnutls.c

@@ -589,7 +589,7 @@ ReadFromTLS(rfbClient* client, char *out, unsigned int n)
 }
 
 int
-WriteToTLS(rfbClient* client, char *buf, unsigned int n)
+WriteToTLS(rfbClient* client, const char *buf, unsigned int n)
 {
   unsigned int offset = 0;
   ssize_t ret;

libvncclient/tls_none.c

@@ -43,7 +43,7 @@ int ReadFromTLS(rfbClient* client, char *out, unsigned int n)
 }
 
 
-int WriteToTLS(rfbClient* client, char *buf, unsigned int n)
+int WriteToTLS(rfbClient* client, const char *buf, unsigned int n)
 {
   rfbClientLog("TLS is not supported.\n");
   errno = EINTR;

libvncclient/tls_openssl.c

@@ -640,7 +640,7 @@ ReadFromTLS(rfbClient* client, char *out, unsigned int n)
 }
 
 int
-WriteToTLS(rfbClient* client, char *buf, unsigned int n)
+WriteToTLS(rfbClient* client, const char *buf, unsigned int n)
 {
   unsigned int offset = 0;
   ssize_t ret;