[PATCH] Fix crash with two typos in the arguments of a function

[Olivier Goffart via cfe-commits]

Hi,

Attached you will find the fix for a crash on invalid code in clang 3.7

It crashes on this code:

void fn2() {
  f(THIS_IS_AN_ERROR,  afunction(afunction_));  
}

The problem is that the arguments are of TheCall are reset later to the ones 
in Args. Some TypoExpr that have already been diagnosed will assert later in 
Sema::getTypoExprState.

I was wondering if instead of reusing the TheCall->getArgs() array I should 
copy the arguments in an array on the stack instead.

I suppose I should commit to trunk and ask someone to merge into release_37?

Regards
-- 
Olivier
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