Objective-C related to NSException.
Fixes <rdar://problem/12287498>
I debated whether or not this logic should be sunk into the CFG
itself. It's not clear if we should, as different analyses may
wish to have different policies. We can re-evaluate this in the
future.
llvm-svn: 163760
definitely have a path leading to them, and possibly have a path leading
to them; reflect that distinction in the warning text emitted.
llvm-svn: 129126