fix non extern instance

Rotzbua · Rotzbua · commit ea7d2add70cf · 2018-08-01T14:02:03.000+02:00
fix arduino/Arduino#1007
diff --git a/cores/arduino/IPAddress.cpp b/cores/arduino/IPAddress.cpp
@@ -112,3 +112,4 @@ size_t IPAddress::printTo(Print& p) const
     return n;
 }
 
+const IPAddress INADDR_NONE(0, 0, 0, 0);
diff --git a/cores/arduino/IPAddress.h b/cores/arduino/IPAddress.h
@@ -73,6 +73,6 @@ class IPAddress : public Printable {
     friend class DNSClient;
 };
 
-const IPAddress INADDR_NONE(0,0,0,0);
+extern const IPAddress INADDR_NONE;
 
 #endif

Original file line number	Diff line number	Diff line change
`@@ -112,3 +112,4 @@ size_t IPAddress::printTo(Print& p) const`
`112`	`112`	`return n;`
`113`	`113`	`}`
`114`	`114`
	`115`	`+const IPAddress INADDR_NONE(0, 0, 0, 0);`