Parse default arguments within member functions in source order, from
Manuel Klimek! Fixes PR7715.

llvm-svn: 116311
diff --git a/clang/lib/Frontend/ASTUnit.cpp b/clang/lib/Frontend/ASTUnit.cpp
index 4319df3..e8e8064 100644
--- a/clang/lib/Frontend/ASTUnit.cpp
+++ b/clang/lib/Frontend/ASTUnit.cpp
@@ -807,6 +807,7 @@
     SavedMainFileBuffer = 0;
   }
   
+  StoredDiagnostics.clear();
   Clang.takeSourceManager();
   Clang.takeFileManager();
   Invocation.reset(Clang.takeInvocation());