Add undefined array subscript checker.

llvm-svn: 86837
diff --git a/clang/lib/Analysis/GRExprEngineInternalChecks.cpp b/clang/lib/Analysis/GRExprEngineInternalChecks.cpp
index ea508a0..984526c 100644
--- a/clang/lib/Analysis/GRExprEngineInternalChecks.cpp
+++ b/clang/lib/Analysis/GRExprEngineInternalChecks.cpp
@@ -415,4 +415,5 @@
 
   RegisterCastToStructChecker(*this);
   RegisterArrayBoundChecker(*this);
+  RegisterUndefinedArraySubscriptChecker(*this);
 }