AnalysisContext is not const.

llvm-svn: 109210
diff --git a/clang/lib/Checker/GRExprEngine.cpp b/clang/lib/Checker/GRExprEngine.cpp
index 364f06d..fe45b7f 100644
--- a/clang/lib/Checker/GRExprEngine.cpp
+++ b/clang/lib/Checker/GRExprEngine.cpp
@@ -1445,7 +1445,7 @@
 
 void GRExprEngine::ProcessCallEnter(GRCallEnterNodeBuilder &B) {
   const StackFrameContext *LocCtx 
-    = AMgr.getStackFrame(const_cast<AnalysisContext *>(B.getCalleeContext()),
+    = AMgr.getStackFrame(B.getCalleeContext(),
                          B.getLocationContext(),
                          B.getCallExpr(),
                          B.getBlock(),