Fix linux compile with latest SDK

This needs some cleanup still for non-TF2

extension/extension.cpp

@@ -71,7 +71,7 @@ public:
 	unsigned short	port;
 } netadr_t;
 
-char *CSteamID::Render() const
+const char *CSteamID::Render() const
 {
 	static char szSteamID[64];
 	V_snprintf(szSteamID, sizeof(szSteamID), "STEAM_0:%u:%u", (m_unAccountID % 2) ? 1 : 0, (int32)m_unAccountID/2);

extension/sdk/smsdk_ext.cpp

@@ -461,5 +461,15 @@ void operator delete[](void * ptr)
 {
 	free(ptr);
 }
+
+void operator delete(void *ptr, size_t size) 
+{
+	free(ptr);
+}
+
+void operator delete[](void * ptr, size_t size)
+{
+	free(ptr);
+}
 #endif