Summary: Current code is checking presence of touchableGetPressRectOffset method but fails immediately on trying to get 'left' value of null.
Closes https://github.com/facebook/react-native/pull/3438
Reviewed By: @svcscm
Differential Revision: D2545068
Pulled By: @javache
fb-gh-sync-id: d16cb46af1fc6eae02f56b2096c2169ce475e022