[core] const buffer * in config_check_cond_nocache

use (const buffer *) in config_check_cond_nocache()

src/configfile-glue.c

@@ -510,7 +510,7 @@ static cond_result_t config_check_cond_nocache(request_st * const r, const data_
 
 	/* pass the rules */
 
-	buffer *l;
+	const buffer *l;
 	switch (dc->comp) {
 	case COMP_HTTP_HOST:
 
@@ -591,28 +591,24 @@ static cond_result_t config_check_cond_nocache(request_st * const r, const data_
 		break;
 
 	case COMP_HTTP_REQUEST_HEADER:
-		*((const buffer **)&l) =
-		  http_header_request_get(r, dc->ext, BUF_PTR_LEN(&dc->comp_tag));
+		l = http_header_request_get(r, dc->ext, BUF_PTR_LEN(&dc->comp_tag));
 		if (NULL == l) l = (buffer *)&empty_string;
 		break;
 	case COMP_HTTP_REQUEST_METHOD:
-		l = r->tmp_buf;
-		buffer_clear(l);
-		http_method_append(l, r->http_method);
+		{
+			buffer * const tb = r->tmp_buf;
+			l = tb;
+			buffer_clear(tb);
+			http_method_append(tb, r->http_method);
+		}
 		break;
 	default:
 		return COND_RESULT_FALSE;
 	}
 
-	if (NULL == l) { /*(should not happen)*/
-		log_error(r->conf.errh, __FILE__, __LINE__,
-			"%s compare to NULL", dc->comp_key);
-		return COND_RESULT_FALSE;
-	}
-	else if (debug_cond) {
+	if (debug_cond)
 		log_error(r->conf.errh, __FILE__, __LINE__,
 			"%s compare to %s", dc->comp_key, l->ptr);
-	}
 
 	switch(dc->cond) {
 	case CONFIG_COND_NE: