bug fix for double free

ncsock/get_sitemap_xml.c

@@ -27,16 +27,15 @@ int get_sitemap_xml(const char* ip, const int port, const int timeout_ms)
   }
 
   int result = send_http_request(ip, port, timeout_ms, &hh, response_buffer, 4096);
-  if (result == -1) {
-    free(response_buffer);
-  }
-
   int code = parse_http_response_code(response_buffer);
-  if (code == 200) {
-    free(response_buffer);
-    return 0;
-  }
 
+  // Move the free operation to the end of the function
+  // Only free memory once, regardless of the result
   free(response_buffer);
-  return -1;
+
+  if (result == -1 || code != 200) {
+    return -1;
+  }
+
+  return 0;
 }