minor, use NN on every OffsetTo<UnsizedArrayOf<>>

src/hb-aat-layout-feat-table.hh

@@ -139,7 +139,7 @@ struct FeatureName
   protected:
   HBUINT16	feature;	/* Feature type. */
   HBUINT16	nSettings;	/* The number of records in the setting name array. */
-  LOffsetTo<UnsizedArrayOf<SettingName>, false>
+  LNNOffsetTo<UnsizedArrayOf<SettingName>>
 		settingTableZ;	/* Offset in bytes from the beginning of this table to
 				 * this feature's setting name array. The actual type of
 				 * record this offset refers to will depend on the

src/hb-aat-layout-trak-table.hh

@@ -141,7 +141,7 @@ struct TrackData
   protected:
   HBUINT16	nTracks;	/* Number of separate tracks included in this table. */
   HBUINT16	nSizes;		/* Number of point sizes included in this table. */
-  LOffsetTo<UnsizedArrayOf<HBFixed>, false>
+  LNNOffsetTo<UnsizedArrayOf<HBFixed>>
 		sizeTable;	/* Offset from start of the tracking table to
 				 * Array[nSizes] of size values.. */
   UnsizedArrayOf<TrackTableEntry>

src/hb-ot-meta-table.hh

@@ -56,7 +56,7 @@ struct DataMap
 
   protected:
   Tag		tag;		/* A tag indicating the type of metadata. */
-  LOffsetTo<UnsizedArrayOf<HBUINT8>>
+  LNNOffsetTo<UnsizedArrayOf<HBUINT8>>
 		dataZ;		/* Offset in bytes from the beginning of the
 				 * metadata table to the data for this tag. */
   HBUINT32	dataLength;	/* Length of the data. The data is not required to