fixed map function undefined issue on android when only has one child

[smilechun]

I have fixed the following issue: fixed map function undefined issue on android when only has one child

[chrisbianca]

Any chance of getting this merged and released? I've just spent an hour trying to figure out why the Android version of my app wouldn't work, whilst iOS would, only to find that this is the reason.

I realise that a single view carousel isn't a carousel, but it would still be nice to have a fix.