[shaper] Remove a macro

src/hb-shaper-private.hh

diff --git a/src/hb-shaper-private.hh b/src/hb-shaper-private.hh
index 8f86b4e..c93b0e0 100644
--- a/src/hb-shaper-private.hh
+++ b/src/hb-shaper-private.hh
@@ -60,10 +60,8 @@
 
 /* Means: succeeded, but don't need to keep any data. */
 #define HB_SHAPER_DATA_SUCCEEDED ((void *) +1)
-
 /* Means: tried but failed to create. */
 #define HB_SHAPER_DATA_INVALID ((void *) -1)
-#define HB_SHAPER_DATA_IS_INVALID(data) ((void *) (data) == HB_SHAPER_DATA_INVALID)
 
 #define HB_SHAPER_DATA_TYPE_NAME(shaper, object)	hb_##shaper##_shaper_##object##_data_t
 #define HB_SHAPER_DATA_TYPE(shaper, object)		struct HB_SHAPER_DATA_TYPE_NAME(shaper, object)
@@ -121,7 +119,7 @@
       goto retry; \
     } \
   } \
-  return data != nullptr && !HB_SHAPER_DATA_IS_INVALID (data); \
+  return data != nullptr && (void *) data != HB_SHAPER_DATA_INVALID; \
 }