(svn r6754) -Codechange: Remove some #idef ENABLE_NETWORK specific defines. With networking

disabled hardcode _networking/_network_available to zero and let the compiler
 handle all optimizations.

network_gui.c

@@ -1720,6 +1720,4 @@ void ShowNetworkChatQueryWindow(byte desttype, byte dest)
 	UpdateTextBufferSize(&WP(w, querystr_d).text);
 }
 
-#else
-void ShowJoinStatusWindowAfterJoin(void) {}
 #endif /* ENABLE_NETWORK */