Initialize an otherwise-wild pointer. Fixes a crashy analyzer

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@77599 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/AnalysisConsumer.cpp b/lib/Frontend/AnalysisConsumer.cpp
index 9c32743..6ed59b4 100644
--- a/lib/Frontend/AnalysisConsumer.cpp
+++ b/lib/Frontend/AnalysisConsumer.cpp
@@ -96,7 +96,7 @@
                      const AnalyzerOptions& opts)
       : LOpts(lopts), Diags(diags),
         Ctx(0), PP(pp), PPF(ppf),
-        OutDir(outdir), Opts(opts) {
+        OutDir(outdir), Opts(opts), PD(0) {
       DigestAnalyzerOptions();
     }