Backport esp8266#7585

Jason2866 · web-flow · commit bdf1933b38c2 · 2020-09-17T15:18:34.000+02:00
diff --git a/cores/esp8266/IPAddress.cpp b/cores/esp8266/IPAddress.cpp
@@ -32,7 +32,7 @@ IPAddress::IPAddress() {
 }
 
 bool IPAddress::isSet () const {
-    return !ip_addr_isany(&_ip);
+    return !ip_addr_isany(&_ip) && ((*this) != IPADDR_NONE);
 }
 
 IPAddress::IPAddress(uint8_t first_octet, uint8_t second_octet, uint8_t third_octet, uint8_t fourth_octet) {

Original file line number	Diff line number	Diff line change
`@@ -32,7 +32,7 @@ IPAddress::IPAddress() {`
`32`	`32`	`}`
`33`	`33`
`34`	`34`	`bool IPAddress::isSet () const {`
`35`		`- return !ip_addr_isany(&_ip);`
	`35`	`+ return !ip_addr_isany(&_ip) && ((*this) != IPADDR_NONE);`
`36`	`36`	`}`
`37`	`37`
`38`	`38`	`IPAddress::IPAddress(uint8_t first_octet, uint8_t second_octet, uint8_t third_octet, uint8_t fourth_octet) {`