AnalysisContext is not const.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@109210 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Checker/GRExprEngine.cpp b/lib/Checker/GRExprEngine.cpp
index 364f06d..fe45b7f 100644
--- a/lib/Checker/GRExprEngine.cpp
+++ b/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(),