Fix copy-paste bug.

llvm-svn: 50557
diff --git a/clang/lib/Analysis/CFRefCount.cpp b/clang/lib/Analysis/CFRefCount.cpp
index 4b1ef88..e62632c 100644
--- a/clang/lib/Analysis/CFRefCount.cpp
+++ b/clang/lib/Analysis/CFRefCount.cpp
@@ -986,7 +986,7 @@
       RVal X = StateMgr.GetRVal(St, lv);
       
       if (isa<lval::SymbolVal>(X)) {
-        SymbolID Sym = cast<lval::SymbolVal>(V).getSymbol();
+        SymbolID Sym = cast<lval::SymbolVal>(X).getSymbol();
         B = Remove(B, Sym);
         
         // Create a new state with the updated bindings.