Make sure we're always setting the previous declaration of an ObjCInterfaceDecl

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146763 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Serialization/ASTReader.cpp b/lib/Serialization/ASTReader.cpp
index 44ffc29..81f08e3 100644
--- a/lib/Serialization/ASTReader.cpp
+++ b/lib/Serialization/ASTReader.cpp
@@ -4559,7 +4559,7 @@
     return 0;
   }
   
-if (!DeclsLoaded[Index]) {
+  if (!DeclsLoaded[Index]) {
     ReadDeclRecord(ID);
     if (DeserializationListener)
       DeserializationListener->DeclRead(ID, DeclsLoaded[Index]);