Fix broken reading of NestedNameSpecifiers from PCH.

llvm-svn: 107784
diff --git a/clang/lib/Frontend/PCHReader.cpp b/clang/lib/Frontend/PCHReader.cpp
index 2b7dcac..e2701ce 100644
--- a/clang/lib/Frontend/PCHReader.cpp
+++ b/clang/lib/Frontend/PCHReader.cpp
@@ -3189,8 +3189,8 @@
       // No associated value, and there can't be a prefix.
       break;
     }
-    Prev = NNS;
     }
+    Prev = NNS;
   }
   return NNS;
 }