JANITORIAL: Remove spaces at the end of the line

I knew there were some, but I wanted to fix them once, instead of doing
it all the time.

backends/networking/curl/curljsonrequest.h

@@ -50,7 +50,7 @@ public:
 	CurlJsonRequest(JsonCallback cb, ErrorCallback ecb, Common::String url);
 	virtual ~CurlJsonRequest();
 
-	virtual void handle(); 
+	virtual void handle();
 	virtual void restart();
 };