TransformUtils: Remove implicit ilist iterator conversions, NFC

Continuing the work from last week to remove implicit ilist iterator
conversions.  First related commit was probably r249767, with some more
motivation in r249925.  This edition gets LLVMTransformUtils compiling
without the implicit conversions.

No functional change intended.

llvm-svn: 250142
diff --git a/llvm/lib/Transforms/Utils/LowerInvoke.cpp b/llvm/lib/Transforms/Utils/LowerInvoke.cpp
index 66d57b0..b0ad4d5 100644
--- a/llvm/lib/Transforms/Utils/LowerInvoke.cpp
+++ b/llvm/lib/Transforms/Utils/LowerInvoke.cpp
@@ -69,7 +69,7 @@
       BranchInst::Create(II->getNormalDest(), II);
 
       // Remove any PHI node entries from the exception destination.
-      II->getUnwindDest()->removePredecessor(BB);
+      II->getUnwindDest()->removePredecessor(&*BB);
 
       // Remove the invoke instruction now.
       BB->getInstList().erase(II);