Fixed the previous bug (read more)

The bug was being caused by not assigning default values to the player
objects' internals. I've added a quick fix to these structs, but I think
it's best to expand them into proper classes now.

server/client_entry.hpp

@@ -25,7 +25,7 @@
 #include "SDL/SDL_net.h"
 
 struct ClientEntry {
-	IPaddress address;
+	IPaddress address = {0,0};
 	static int uidCounter;
 };