Add hb_blob_ptr_t.destroy()

src/hb-blob.hh

@@ -97,6 +97,7 @@ struct hb_blob_ptr_t
   inline const T * get (void) const { return b->as<T> (); }
   inline hb_blob_t * get_blob (void) const { return b.get_raw (); }
   inline unsigned int get_length (void) const { return b.get ()->length; }
+  inline void destroy (void) { hb_blob_destroy (b.get ()); b = nullptr; }
 
   hb_nonnull_ptr_t<hb_blob_t> b;
 };

src/hb-ot-cmap-table.hh

@@ -1050,7 +1050,7 @@ struct cmap
 
     inline void fini (void)
     {
-      hb_blob_destroy (this->table.get_blob ());
+      this->table.destroy ();
     }
 
     inline bool get_nominal_glyph (hb_codepoint_t  unicode,

src/hb-ot-color-cbdt-table.hh

@@ -392,8 +392,8 @@ struct CBDT
 
     inline void fini (void)
     {
-      hb_blob_destroy (this->cblc.get_blob ());
-      hb_blob_destroy (this->cbdt.get_blob ());
+      this->cblc.destroy ();
+      this->cbdt.destroy ();
     }
 
     inline bool get_extents (hb_font_t *font, hb_codepoint_t glyph,

src/hb-ot-color-sbix-table.hh

@@ -146,7 +146,7 @@ struct sbix
 
     inline void fini (void)
     {
-      hb_blob_destroy (table.get_blob ());
+      table.destroy ();
     }
 
     inline bool has_data () const

src/hb-ot-color-svg-table.hh

@@ -86,7 +86,7 @@ struct SVG
 
     inline void fini (void)
     {
-      hb_blob_destroy (table.get_blob ());
+      table.destroy ();
     }
 
     inline hb_blob_t *reference_blob_for_glyph (hb_codepoint_t glyph_id) const

src/hb-ot-glyf-table.hh

@@ -254,8 +254,8 @@ struct glyf
 
     inline void fini (void)
     {
-      hb_blob_destroy (loca_table.get_blob ());
-      hb_blob_destroy (glyf_table.get_blob ());
+      loca_table.destroy ();
+      glyf_table.destroy ();
     }
 
     /*

src/hb-ot-hmtx-table.hh

@@ -234,7 +234,7 @@ struct hmtxvmtx
       if (unlikely (!num_advances))
       {
 	num_metrics = num_advances = 0;
-	hb_blob_destroy (table.get_blob ());
+	table.destroy ();
 	table = hb_blob_get_empty ();
       }
 
@@ -243,8 +243,8 @@ struct hmtxvmtx
 
     inline void fini (void)
     {
-      hb_blob_destroy (table.get_blob ());
-      hb_blob_destroy (var_table.get_blob ());
+      table.destroy ();
+      var_table.destroy ();
     }
 
     /* TODO Add variations version. */

src/hb-ot-layout-gdef-table.hh

@@ -412,7 +412,7 @@ struct GDEF
 
     inline void fini (void)
     {
-      hb_blob_destroy (this->table.get_blob ());
+      this->table.destroy ();
     }
 
     hb_blob_ptr_t<GDEF> table;

src/hb-ot-layout-gsubgpos.hh

@@ -2769,7 +2769,7 @@ struct GSUBGPOS
       for (unsigned int i = 0; i < this->lookup_count; i++)
 	this->accels[i].fini ();
       free (this->accels);
-      hb_blob_destroy (this->table.get_blob ());
+      this->table.destroy ();
     }
 
     hb_blob_ptr_t<T> table;

src/hb-ot-name-table.hh

@@ -220,7 +220,7 @@ struct name
     inline void fini (void)
     {
       this->names.fini ();
-      hb_blob_destroy (this->table.get_blob ());
+      this->table.destroy ();
     }
 
     inline int get_index (hb_ot_name_id_t   name_id,

src/hb-ot-post-table.hh

@@ -123,7 +123,7 @@ struct post
     {
       index_to_offset.fini ();
       free (gids_sorted_by_name.get ());
-      hb_blob_destroy (table.get_blob ());
+      table.destroy ();
     }
 
     inline bool get_glyph_name (hb_codepoint_t glyph,