Fix Windows ARM release build break (#15958)

diff --git a/src/jit/morph.cpp b/src/jit/morph.cpp
index 17e4b2b..e07e037 100644 (file)
--- a/src/jit/morph.cpp
+++ b/src/jit/morph.cpp
@@ -4967,7 +4967,7 @@ GenTreePtr Compiler::fgMorphMultiregStructArg(GenTreePtr arg, fgArgTabEntryPtr f
         if (lcl != nullptr)
         {
             // Its fields will need to accessed by address.
-            lvaSetVarDoNotEnregister(lcl->gtLclNum, DNER_IsStructArg);
+            lvaSetVarDoNotEnregister(lcl->gtLclNum DEBUG_ARG(DNER_IsStructArg));
         }
 
         return arg;