update: json convert result in debug log

src/applet/adguard.c

@@ -94,7 +94,6 @@ process* adguard_load(adguard *info, const char *dir) { // load adguard options
     } else { // configure exist -> modify
         char *adguard_config_content = read_file(adguard_config_file);
         char *adguard_config_json = to_json(adguard_config_content);
-        log_debug("AdGuardHome json configure ->\n%s", adguard_config_json);
         adguard_config_ret = adguard_config(info, adguard_config_json);
         free(adguard_config_content);
         free(adguard_config_json);

src/common/json.c

@@ -22,9 +22,11 @@ char* to_json(const char *content) { // convert JSON / TOML / YAML to json forma
     char *json_content = strdup(json_string); // load string into owner heap
     free_rust_string(json_string); // free rust string
     if (strlen(json_content) == 0) { // empty string -> convert error
+        log_warn("JSON convert error ->\n%s", content);
         free(json_content);
         return NULL;
     }
+    log_debug("JSON convert result ->\n%s", json_content);
     return json_content;
 }