[LLVMdev] creating InvokeInst without branch locations

[edA-qa mort-ora-y]

Is it okay to pass null values to the destinations of
InvokeInst::Create? I checked the code and it looks like it'd be okay,
but the Create method doesn't make them optional, so I'm uncertain.
Perhaps a specific Create function without destinations can be added to
make it clear that it's okay (of course assuming you eventually call
setNormal/UnwindDest).

-- 
edA-qa mort-ora-y
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