[AA] Initialize Depth member

Fix mistake introduced in f8afba5f7a25a69c12191d979d78d40fa6e5b684:
I failed to initialize the Depth member to zero.

diff --git a/llvm/include/llvm/Analysis/AliasAnalysis.h b/llvm/include/llvm/Analysis/AliasAnalysis.h
index 05c0193..ce4ebab 100644 (file)
--- a/llvm/include/llvm/Analysis/AliasAnalysis.h
+++ b/llvm/include/llvm/Analysis/AliasAnalysis.h
@@ -815,7 +815,7 @@ private:
   std::vector<AnalysisKey *> AADeps;
 
   /// Query depth used to distinguish recursive queries.
-  unsigned Depth;
+  unsigned Depth = 0;
 
   friend class BatchAAResults;
 };