Fix typo in debug method.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@162352 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/DumpXML.cpp b/lib/AST/DumpXML.cpp
index 84f3fc4..29d8c62 100644
--- a/lib/AST/DumpXML.cpp
+++ b/lib/AST/DumpXML.cpp
@@ -1023,7 +1023,7 @@
 }
 
 void Decl::dumpXML() const {
-  dump(llvm::errs());
+  dumpXML(llvm::errs());
 }
 
 void Decl::dumpXML(raw_ostream &out) const {