Fixed NPE when discord provides us with a PrivateChannel that we cannot communicate with.
Fixed NPE when discord provides us with a PrivateChannel that we cannot communicate with.

DV8FromTheWorld/JDA,DV8FromTheWorld/JDA,mentlerd/JDA,Almighty-Alpaca/JDA,Java-Discord-Bot-System/JDA,LAX1DUDE/JDA,Xevryll/JDA