Minimal fix for libupnp-1.18
https://github.com/amule-project/amule/pull/448

--- a/src/UPnPBase.cpp
+++ b/src/UPnPBase.cpp
@@ -1129,7 +1147,9 @@ bool CUPnPControlPoint::PrivateDeletePortMapping(
 
 
 // This function is static
-#if UPNP_VERSION >= 10800
+#if UPNP_VERSION >= 11800
+int CUPnPControlPoint::Callback(Upnp_EventType_e EventType, void *Event, void * /*Cookie*/)
+#elif UPNP_VERSION >= 10800
 int CUPnPControlPoint::Callback(Upnp_EventType_e EventType, const void *Event, void * /*Cookie*/)
 #else
 int CUPnPControlPoint::Callback(Upnp_EventType EventType, void *Event, void * /*Cookie*/)
--- a/src/UPnPBase.h
+++ b/src/UPnPBase.h
@@ -491,7 +491,11 @@ public:
 
 	// Callback function
 	static int Callback(
-#if UPNP_VERSION >= 10800
+#if UPNP_VERSION >= 11800
+		Upnp_EventType_e EventType,
+		void *Event,
+		void *Cookie);
+#elif UPNP_VERSION >= 10800
 		Upnp_EventType_e EventType,
 		const void *Event,
 		void *Cookie);