Refactored to avoid compiler warning (#6278)

Fixes commit 2d9253e.

Author: dok-net

libraries/ESP8266mDNS/src/LEAmDNS.cpp

@@ -1051,7 +1051,7 @@ bool MDNSResponder::setHostProbeResultCallback(MDNSResponder::MDNSHostProbeFn p_
 
 bool MDNSResponder::setHostProbeResultCallback(MDNSHostProbeFn1 pfn) {
     using namespace std::placeholders;
-    return setHostProbeResultCallback([resp=std::ref(*this), pfn](const char* p_pcDomainName, bool p_bProbeResult) { pfn(resp, p_pcDomainName, p_bProbeResult); });
+    return setHostProbeResultCallback([this, pfn](const char* p_pcDomainName, bool p_bProbeResult) { pfn(*this, p_pcDomainName, p_bProbeResult); });
 }
 
 /*
@@ -1080,8 +1080,8 @@ bool MDNSResponder::setServiceProbeResultCallback(const MDNSResponder::hMDNSServ
 bool MDNSResponder::setServiceProbeResultCallback(const MDNSResponder::hMDNSService p_hService,
                                                   MDNSResponder::MDNSServiceProbeFn1 p_fnCallback) {
     using namespace std::placeholders;
-    return setServiceProbeResultCallback(p_hService, [resp=std::ref(*this), p_fnCallback](const char* p_pcServiceName, const hMDNSService p_hMDNSService, bool p_bProbeResult) {
-        p_fnCallback(resp, p_pcServiceName, p_hMDNSService, p_bProbeResult);
+    return setServiceProbeResultCallback(p_hService, [this, p_fnCallback](const char* p_pcServiceName, const hMDNSService p_hMDNSService, bool p_bProbeResult) {
+        p_fnCallback(*this, p_pcServiceName, p_hMDNSService, p_bProbeResult);
     });
 }