[C++11] Add 'override' keyword to virtual methods that override their base class.

llvm-svn: 203999
diff --git a/clang/lib/StaticAnalyzer/Checkers/DeadStoresChecker.cpp b/clang/lib/StaticAnalyzer/Checkers/DeadStoresChecker.cpp
index e804ae3..6001a3c 100644
--- a/clang/lib/StaticAnalyzer/Checkers/DeadStoresChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/DeadStoresChecker.cpp
@@ -255,8 +255,8 @@
     return false;
   }
 
-  virtual void observeStmt(const Stmt *S, const CFGBlock *block,
-                           const LiveVariables::LivenessValues &Live) {
+  void observeStmt(const Stmt *S, const CFGBlock *block,
+                   const LiveVariables::LivenessValues &Live) override {
 
     currentBlock = block;