Add a missing getMostRecentDecl to ClassTemplateDecl.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193040 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/AST/DeclTemplate.h b/include/clang/AST/DeclTemplate.h
index 26f6891..d2984fe 100644
--- a/include/clang/AST/DeclTemplate.h
+++ b/include/clang/AST/DeclTemplate.h
@@ -1900,6 +1900,14 @@
              RedeclarableTemplateDecl::getPreviousDecl());
   }
 
+  ClassTemplateDecl *getMostRecentDecl() {
+    return cast<ClassTemplateDecl>(
+        RedeclarableTemplateDecl::getMostRecentDecl());
+  }
+  const ClassTemplateDecl *getMostRecentDecl() const {
+    return const_cast<ClassTemplateDecl*>(this)->getMostRecentDecl();
+  }
+
   ClassTemplateDecl *getInstantiatedFromMemberTemplate() {
     return cast_or_null<ClassTemplateDecl>(
              RedeclarableTemplateDecl::getInstantiatedFromMemberTemplate());