LiveRangeCalc.h: Update a description corresponding to r192396. [-Wdocumentation]

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192421 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LiveRangeCalc.h b/lib/CodeGen/LiveRangeCalc.h
index 36d3a08..a3a3fbb 100644
--- a/lib/CodeGen/LiveRangeCalc.h
+++ b/lib/CodeGen/LiveRangeCalc.h
@@ -210,7 +210,7 @@
   /// function can only be called once per basic block.  Once the live-in value
   /// has been determined, calculateValues() will add liveness to LI.
   ///
-  /// @param LI      The live range that is live-in to the block.
+  /// @param LR      The live range that is live-in to the block.
   /// @param DomNode The domtree node for the block.
   /// @param Kill    Index in block where LI is killed.  If the value is
   ///                live-through, set Kill = SLotIndex() and also call