Fix comment to match name of variable.

llvm-svn: 191171
diff --git a/clang/lib/AST/ExprConstant.cpp b/clang/lib/AST/ExprConstant.cpp
index 0fb6d42..fc35f49 100644
--- a/clang/lib/AST/ExprConstant.cpp
+++ b/clang/lib/AST/ExprConstant.cpp
@@ -302,7 +302,7 @@
     /// This - The binding for the this pointer in this call, if any.
     const LValue *This;
 
-    /// ParmBindings - Parameter bindings for this function call, indexed by
+    /// Arguments - Parameter bindings for this function call, indexed by
     /// parameters' function scope indices.
     APValue *Arguments;