Cleanup: remove artificial division between lookup results and const lookup
results. No-one was ever modifying a lookup result, and it would not be
reasonable to do so.

llvm-svn: 230123
diff --git a/clang/lib/Sema/SemaLookup.cpp b/clang/lib/Sema/SemaLookup.cpp
index 65e8ffb..06d2223 100644
--- a/clang/lib/Sema/SemaLookup.cpp
+++ b/clang/lib/Sema/SemaLookup.cpp
@@ -673,8 +673,8 @@
     DeclareImplicitMemberFunctionsWithName(S, R.getLookupName(), DC);
 
   // Perform lookup into this declaration context.
-  DeclContext::lookup_const_result DR = DC->lookup(R.getLookupName());
-  for (DeclContext::lookup_const_iterator I = DR.begin(), E = DR.end(); I != E;
+  DeclContext::lookup_result DR = DC->lookup(R.getLookupName());
+  for (DeclContext::lookup_iterator I = DR.begin(), E = DR.end(); I != E;
        ++I) {
     NamedDecl *D = *I;
     if ((D = R.getAcceptableDecl(D))) {