Prevent app crash on home screen

[cewert]

This was fixed before but the crash just moved further down the app. This should hopefully fix it for good

This is one of those crashlogs that says one line in the error text but then the backtrace points to a different line.

Error text: Function itemcontentchanged() As Void; pkg:/components/home/HomeItem.brs(81)

Full backtrace:

Invalid value for left-side of expression. (runtime error &he4) in pkg:/components/home/HomeItem.brs(79) 
Backtrace: 
#0  Function itemcontentchanged() As Voi$1 file/line: pkg:/components/home/HomeItem.brs(81) 
Local Variables: 
global           Interface:ifGloba$1 m                roAssociativeArray refcnt=2 count:6 
itemdata         roSGNode:HomeData refcnt=1 
localglobal      roSGNode:Node refcnt=2 
playedindicatorleftposition <uninitialized> 
extraprefix      <uninitialized> 
textextra        <uninitialized> 
BRIGHTSCRIPT: ERROR: roSGNode.<lookup>: Rendezvous aborted for LoadItemsTask: pkg:/components/home/LoadItemsTask.brs(55)

which points to this line(79) after running build-prod on 2.1.4:

m.itemIcon.uri = itemData.iconUrl

Issues

Ref #1164