Use a range-based for loop; NFC.

llvm-svn: 242836
diff --git a/clang/lib/Sema/SemaExprCXX.cpp b/clang/lib/Sema/SemaExprCXX.cpp
index 845cd4d..6661750 100644
--- a/clang/lib/Sema/SemaExprCXX.cpp
+++ b/clang/lib/Sema/SemaExprCXX.cpp
@@ -4021,8 +4021,8 @@
     // Precondition: T and all types in the parameter pack Args shall be
     // complete types, (possibly cv-qualified) void, or arrays of
     // unknown bound.
-    for (unsigned I = 0, N = Args.size(); I != N; ++I) {
-      QualType ArgTy = Args[I]->getType();
+    for (const auto *TSI : Args) {
+      QualType ArgTy = TSI->getType();
       if (ArgTy->isVoidType() || ArgTy->isIncompleteArrayType())
         continue;