CocoaSpice: fixed a couple of edge condition UaFs

Author: osy

Services/UTMSpiceIO.m

@@ -202,15 +202,13 @@ - (void)spiceInputUnavailable:(CSConnection *)connection input:(CSInput *)input
 }
 
 - (void)spiceDisconnected:(CSConnection *)connection {
-    NSAssert(connection == self.spiceConnection, @"Unknown connection");
     self.isConnected = NO;
     if ([self.delegate respondsToSelector:@selector(spiceDidDisconnect)]) {
         [self.delegate spiceDidDisconnect];
     }
 }
 
 - (void)spiceError:(CSConnection *)connection code:(CSConnectionError)code message:(nullable NSString *)message {
-    NSAssert(connection == self.spiceConnection, @"Unknown connection");
     self.isConnected = NO;
 #if defined(WITH_REMOTE)
     [self.connectDelegate remoteInterface:self didErrorWithMessage:message];