Fix for issue https://github.com/flutter/flutter/issues/6826 (#6833)
Fix for issue https://github.com/flutter/flutter/issues/6826 (#6833)

Exception in Flutter Gallery / Dialogs Demo #6826
tvolkert/flutter,flutter/flutter,flutter/flutter,flutter/flutter,tvolkert/flutter,turnidge/flutter,tvolkert/flutter,tvolkert/flutter,tvolkert/flutter,turnidge/flutter,cbracken/flutter,cbracken/flutter,flutter/flutter,flutter/flutter,cbracken/flutter,turnidge/flutter,turnidge/flutter,Hixie/flutter,Hixie/flutter,flutter/flutter,turnidge/flutter,Hixie/flutter,cbracken/flutter,tvolkert/flutter,cbracken/flutter,Hixie/flutter,Hixie/flutter,Hixie/flutter,cbracken/flutter,flutter/flutter,flutter/flutter,flutter/flutter,Hixie/flutter,Hixie/flutter,cbracken/flutter,cbracken/flutter,Hixie/flutter,flutter/flutter,cbracken/flutter,tvolkert/flutter,tvolkert/flutter,Hixie/flutter,tvolkert/flutter,tvolkert/flutter,cbracken/flutter