The replace all block (text function) fails if its argument is null

[GoogleCodeExporter]

If you send a null to the replace all block, app inventor crashes. Update the 
replace all text manipulation block so that if it receives a null it simply 
returns a null.

Original issue reported on code.google.com by shail...@gmail.com on 29 Nov 2012 at 4:42

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Original comment by andrew.f...@gmail.com on 29 Nov 2012 at 5:35

• Changed state: Accepted

[GoogleCodeExporter]

I looked at this issue with the original app that was causing it.  The app was 
reporting a "Runtime Error" when the "Insert" button was clicked.  The problem 
was due to there being an empty-slot in the InsertIntoTable procedure.  Given 
the empty slot, the procedure, and hence the call to replace-all, was not being 
loaded onto the phone.  So the cause of the problem was the empty slot, not the 
replace-all function.

Original comment by ram8...@gmail.com on 4 Dec 2012 at 3:41

• Changed state: Started

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Original comment by halabel...@google.com on 4 Dec 2012 at 12:51

• Changed state: Invalid