Fixed wrong type for getChild<LLTextBox>("user_name") to prevent WARNING logging.
Fixed wrong type for getChild<LLTextBox>("user_name") to prevent WARNING logging.

gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm