libfreerdp-core/server: fix a corrupted memory access issue.

The peer context memory block should not be freed by the server
implementation because it still needs to be accessed after the
context free callback has been called. It should be the core's
responsibility to free it.

libfreerdp-core/peer.c

@@ -394,6 +394,7 @@ void freerdp_peer_free(freerdp_peer* client)
 	if (client)
 	{
 		rdp_free(client->context->rdp);
+		xfree(client->context);
 		xfree(client);
 	}
 }

server/Windows/wfreerdp.c

@@ -50,7 +50,6 @@ void wf_peer_context_free(freerdp_peer* client, wfPeerContext* context)
 {
 	if (context)
 	{
-		xfree(context);
 	}
 }
 

server/X11/xf_peer.c

@@ -273,7 +273,6 @@ void xf_peer_context_free(freerdp_peer* client, xfPeerContext* context)
 	{
 		stream_free(context->s);
 		rfx_context_free(context->rfx_context);
-		xfree(context);
 	}
 }
 

server/test/tfreerdp.c

@@ -123,7 +123,6 @@ void test_peer_context_free(freerdp_peer* client, testPeerContext* context)
 			audin_server_context_free(context->audin);
 		}
 		WTSDestroyVirtualChannelManager(context->vcm);
-		xfree(context);
 	}
 }