redundant return code check

[leeriorio]

In result of static analyse of nginx sources (including headers-more-nginx-module) with Svace static analyzer I found minor error of cathegory "REDUNDANT_COMPARISON.ALWAYS_FALSE" in ngx_http_headers_more_filter_module.c.

headers-more-nginx-module/src/ngx_http_headers_more_filter_module.c

Lines 234 to 239 in f8f8099

	if (multi_http_blocks || hmcf->requires_filter) {
	rc = ngx_http_headers_more_filter_init(cf);
	if (rc != NGX_OK) {
	return rc;
	}
	}

calling function ngx_http_headers_more_filter_init returns NGX_OK code only. Is it correct to check it there?

[zhuizhuhaomeng]

Yes, we should check it here in case the ngx_http_headers_more_filter_init() returns other code in the future.