Fix regression introduced in r80786 and reported in PR 4867. We should use
'dyn_cast' instead of 'cast' as the denominator value could be UnknownVal (and
is not guaranteed to be a DefinedVal).


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@80869 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed