AsyncWeb_Prometheus.patch

diff --git a/src/AsyncWebSocket.cpp b/src/AsyncWebSocket.cpp
index 6e88da9..09359c3 100644
--- a/src/AsyncWebSocket.cpp
+++ b/src/AsyncWebSocket.cpp
@@ -827,7 +827,7 @@ void AsyncWebSocketClient::binary(AsyncWebSocketMessageBuffer * buffer)
 
 IPAddress AsyncWebSocketClient::remoteIP() {
     if(!_client) {
-        return IPAddress((uint32_t)0);
+        return IPAddress();
     }
     return _client->remoteIP();
 }
diff --git a/src/WebResponses.cpp b/src/WebResponses.cpp
index a22e991..babef18 100644
--- a/src/WebResponses.cpp
+++ b/src/WebResponses.cpp
@@ -317,7 +317,7 @@ size_t AsyncAbstractResponse::_ack(AsyncWebServerRequest *request, size_t len, u
           free(buf);
           return 0;
       }
-      outLen = sprintf((char*)buf+headLen, "%x", readLen) + headLen;
+      outLen = sprintf((char*)buf+headLen, "%04x", readLen) + headLen;
       while(outLen < headLen + 4) buf[outLen++] = ' ';
       buf[outLen++] = '\r';
       buf[outLen++] = '\n';