Update components/stratum/stratum_api.c

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

Author: WantClue

components/stratum/stratum_api.c

@@ -173,9 +173,15 @@ char * STRATUM_V1_receive_jsonrpc_line(esp_transport_handle_t transport)
             timeout_count++;
             if (timeout_count >= 10) {
                 ESP_LOGW(TAG, "Transport read timed out %d times, giving up", timeout_count);
+                free(json_rpc_buffer);
+                json_rpc_buffer = NULL;
+                json_rpc_buffer_size = 0;
                 return NULL;
             }
             continue;
+        }
+            }
+            continue;
         }
         timeout_count = 0;
         realloc_json_buffer(nbytes);