Disambiguated variable name to comply with VC++'s archaic variable scoping rules.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43371 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/AST/StmtIterator.cpp b/AST/StmtIterator.cpp
index 961ca50..bcf495a 100644
--- a/AST/StmtIterator.cpp
+++ b/AST/StmtIterator.cpp
@@ -73,7 +73,7 @@
   if (VarDecl* D = dyn_cast<VarDecl>(Ptr.D))
     return reinterpret_cast<Stmt*&>(D->Init);
   else {
-    EnumConstantDecl* D = cast<EnumConstantDecl>(Ptr.D);
-    return reinterpret_cast<Stmt*&>(D->Init);
+    EnumConstantDecl* Decl = cast<EnumConstantDecl>(Ptr.D);
+    return reinterpret_cast<Stmt*&>(Decl->Init);
   }
 }