Changed Packet::operator bool() to Packet::operator void*(), to avoid inappropriate implicit conversions

include/SFML/Network/Packet.hpp

@@ -159,7 +159,7 @@ public :
     /// \see EndOfPacket
     ///
     ////////////////////////////////////////////////////////////
-    operator bool() const;
+    operator void*() const;
 
     ////////////////////////////////////////////////////////////
     /// Overloads of operator >> to read data from the packet

src/SFML/Network/Packet.cpp

@@ -92,9 +92,9 @@ bool Packet::EndOfPacket() const
 
 
 ////////////////////////////////////////////////////////////
-Packet::operator bool() const
+Packet::operator void*() const
 {
-    return myIsValid;
+    return myIsValid ? this : NULL;
 }