In FixItRecompile::BeginInvocation() reset the diagnostics before executing
the original action.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149120 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Rewrite/FrontendActions.cpp b/lib/Rewrite/FrontendActions.cpp
index 5e33a44..49ae4ce 100644
--- a/lib/Rewrite/FrontendActions.cpp
+++ b/lib/Rewrite/FrontendActions.cpp
@@ -138,6 +138,7 @@
   if (err)
     return false;
   CI.getDiagnosticClient().clear();
+  CI.getDiagnostics().Reset();
 
   PreprocessorOptions &PPOpts = CI.getPreprocessorOpts();
   PPOpts.RemappedFiles.insert(PPOpts.RemappedFiles.end(),