MT#55283 fix null pointer

Change-Id: I98e6e17e2da91f66048f209d6eaed42d652f8faf
Warned-by: Coverity

daemon/call_interfaces.c

@@ -2689,7 +2689,6 @@ void ng_call_stats(ng_command_ctx_t *ctx, call_t *call, const str *fromtag, cons
 	struct call_monologue *ml;
 	struct call_stats t_b;
 	parser_arg ssrc = {0};
-	const ng_parser_t *parser = ctx->parser_ctx.parser;
 
 	if (!totals)
 		totals = &t_b;
@@ -2700,6 +2699,8 @@ void ng_call_stats(ng_command_ctx_t *ctx, call_t *call, const str *fromtag, cons
 
 	call_ngb_hold_ref(call, ctx->ngbuf);
 
+	const ng_parser_t *parser = ctx->parser_ctx.parser;
+
 	parser->dict_add_int(ctx->resp, "created", call->created.tv_sec);
 	parser->dict_add_int(ctx->resp, "created_us", call->created.tv_usec);
 	parser->dict_add_int(ctx->resp, "last signal", call->last_signal);