jscript: Add a trailing '\n' to a WARN() message.

dlls/jscript/enumerator.c

@@ -73,7 +73,7 @@ static inline HRESULT enumvar_get_next_item(EnumeratorInstance *This)
         VariantClear(&nextitem);
         if (FAILED(hres))
         {
-            WARN("failed to convert jsval to variant!");
+            WARN("failed to convert jsval to variant!\n");
             This->item = jsval_undefined();
             return hres;
         }