update comments.

llvm-svn: 112796
diff --git a/clang/lib/Checker/GRExprEngine.cpp b/clang/lib/Checker/GRExprEngine.cpp
index 12974e9..9832323 100644
--- a/clang/lib/Checker/GRExprEngine.cpp
+++ b/clang/lib/Checker/GRExprEngine.cpp
@@ -1869,7 +1869,9 @@
 
 /// EvalStore - Handle the semantics of a store via an assignment.
 ///  @param Dst The node set to store generated state nodes
-///  @param Ex The expression representing the location of the store
+///  @param AssignE The assignment expression if the store happens in an 
+///         assignment.
+///  @param LocatioinE The location expression that is stored to.
 ///  @param state The current simulation state
 ///  @param location The location to store the value
 ///  @param Val The value to be stored