prevent segfault

libvncserver/rfbssl_gnutls.c

@@ -109,6 +109,8 @@ struct rfbssl_ctx *rfbssl_init_global(char *key, char *cert)
 	gnutls_global_set_log_function(rfbssl_log_func);
 	gnutls_global_set_log_level(1);
 	gnutls_certificate_set_dh_params(ctx->x509_cred, ctx->dh_params);
+	//newly allocated memory should be initialized, at least where it is important
+	ctx->peekstart = ctx->peeklen = 0;
 	return ctx;
     }
 

libvncserver/tight.c

@@ -163,7 +163,11 @@ void rfbTightCleanup (rfbScreenInfoPtr screen)
         tightAfterBufSize = 0;
         tightAfterBuf = NULL;
     }
-    if (j) tjDestroy(j);
+	if (j) {
+		tjDestroy(j);
+		//Set freed resource handle to 0!
+		j = 0;
+	}
 }