Remove the ref/value inconsistency in filter_decl_iterator.

filter_decl_iterator had a weird mismatch where both op* and op-> returned T*
making it difficult to generalize this filtering behavior into a reusable
library of any kind.

This change errs on the side of value, making op-> return T* and op* return
T&.

(reviewed by Richard Smith)

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@155808 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/StaticAnalyzer/Checkers/CallAndMessageChecker.cpp b/lib/StaticAnalyzer/Checkers/CallAndMessageChecker.cpp
index f601431..2c7c951 100644
--- a/lib/StaticAnalyzer/Checkers/CallAndMessageChecker.cpp
+++ b/lib/StaticAnalyzer/Checkers/CallAndMessageChecker.cpp
@@ -144,9 +144,9 @@
           assert(RD && "Referred record has no definition");
           for (RecordDecl::field_iterator I =
                RD->field_begin(), E = RD->field_end(); I!=E; ++I) {
-            const FieldRegion *FR = MrMgr.getFieldRegion(*I, R);
-            FieldChain.push_back(*I);
-            T = (*I)->getType();
+            const FieldRegion *FR = MrMgr.getFieldRegion(&*I, R);
+            FieldChain.push_back(&*I);
+            T = I->getType();
             if (T->getAsStructureType()) {
               if (Find(FR))
                 return true;