DebugInfo: Revert change to the return type of createRecordFwdDecl

It still does only return DICompositeType, but I've no need to make that
change right now.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@188482 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGDebugInfo.cpp b/lib/CodeGen/CGDebugInfo.cpp
index 81354b8..5ac4a5d 100644
--- a/lib/CodeGen/CGDebugInfo.cpp
+++ b/lib/CodeGen/CGDebugInfo.cpp
@@ -602,11 +602,9 @@
 }
 
 // Creates a forward declaration for a RecordDecl in the given context.
-llvm::DICompositeType
-CGDebugInfo::getOrCreateRecordFwdDecl(const RecordDecl *RD,
-                                      llvm::DIDescriptor Ctx) {
-  llvm::DICompositeType T(getTypeOrNull(CGM.getContext().getRecordType(RD)));
-  if (T)
+llvm::DIType CGDebugInfo::getOrCreateRecordFwdDecl(const RecordDecl *RD,
+                                                   llvm::DIDescriptor Ctx) {
+  if (llvm::DIType T = getTypeOrNull(CGM.getContext().getRecordType(RD)))
     return T;
   llvm::DIFile DefUnit = getOrCreateFile(RD->getLocation());
   unsigned Line = getLineNumber(RD->getLocation());