Remember that FixItOptions* is optional and don't crash when it's not provided.

llvm-svn: 111084
diff --git a/clang/lib/Rewrite/FixItRewriter.cpp b/clang/lib/Rewrite/FixItRewriter.cpp
index 875af7a7..20cefb0 100644
--- a/clang/lib/Rewrite/FixItRewriter.cpp
+++ b/clang/lib/Rewrite/FixItRewriter.cpp
@@ -49,7 +49,7 @@
 }
 
 bool FixItRewriter::WriteFixedFiles() {
-  if (NumFailures > 0 && !FixItOpts->FixWhatYouCan) {
+  if (NumFailures > 0 && (!FixItOpts || !FixItOpts->FixWhatYouCan)) {
     Diag(FullSourceLoc(), diag::warn_fixit_no_changes);
     return true;
   }