storage_migrate: only set errfunc for send stream

since we redirect the output to our (insecure) socket, logfunc is only
used for STDERR anyway, so we might as well make it explicit on the
caller side.

Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>

PVE/Storage.pm

@@ -626,7 +626,7 @@ sub storage_migrate {
 		or die "failed to connect to tunnel at $ip:$port\n";
 	    # we won't be reading from the socket
 	    shutdown($socket, 0);
-	    run_command([$send, @cstream], output => '>&'.fileno($socket), logfunc => $logfunc);
+	    run_command([$send, @cstream], output => '>&'.fileno($socket), errfunc => $logfunc);
 	    # don't close the connection entirely otherwise the receiving end
 	    # might not get all buffered data (and fails with 'connection reset by peer')
 	    shutdown($socket, 1);