Prevent crash on GridItemSmall

[cewert]

Comes from roku.com crash log:

Invalid value for left-side of expression. (runtime error &he4) in pkg:/components/ItemGrid/GridItemSmall.brs(51) 
Backtrace: 
#0  Function focuschanged() As Voi$1 file/line: pkg:/components/ItemGrid/GridItemSmall.brs(53) 
Local Variables: 
global           Interface:ifGloba$1 m                roAssociativeArray refcnt=2 count:2

which points to this line after running build-prod on 2.1.4:

m.title.repeatCount = 0

Issues

Ref #1164