dwrite: Remove useless casts to self.

dlls/dwrite/font.c

@@ -2420,7 +2420,7 @@ static HRESULT create_fontfamily(struct dwrite_fontcollection *collection, UINT3
 BOOL is_system_collection(IDWriteFontCollection *collection)
 {
     void *obj;
-    return IDWriteFontCollection_QueryInterface(collection, &IID_issystemcollection, (void**)&obj) == S_OK;
+    return IDWriteFontCollection_QueryInterface(collection, &IID_issystemcollection, &obj) == S_OK;
 }
 
 static HRESULT WINAPI dwritesystemfontcollection_QueryInterface(IDWriteFontCollection1 *iface, REFIID riid, void **obj)

dlls/dwrite/layout.c

@@ -2520,7 +2520,7 @@ static BOOL set_layout_range_attrval(struct layout_range_header *h, enum layout_
         changed = set_layout_range_iface_attr((IUnknown**)&dest->object, (IUnknown*)value->u.object);
         break;
     case LAYOUT_RANGE_ATTR_EFFECT:
-        changed = set_layout_range_iface_attr((IUnknown**)&dest_iface->iface, (IUnknown*)value->u.effect);
+        changed = set_layout_range_iface_attr(&dest_iface->iface, value->u.effect);
         break;
     case LAYOUT_RANGE_ATTR_UNDERLINE:
         changed = dest_bool->value != value->u.underline;
@@ -2560,7 +2560,7 @@ static BOOL set_layout_range_attrval(struct layout_range_header *h, enum layout_
         dest_spacing->min_advance = value->u.spacing.min_advance;
         break;
     case LAYOUT_RANGE_ATTR_TYPOGRAPHY:
-        changed = set_layout_range_iface_attr((IUnknown**)&dest_iface->iface, (IUnknown*)value->u.typography);
+        changed = set_layout_range_iface_attr(&dest_iface->iface, (IUnknown*)value->u.typography);
         break;
     default:
         ;

dlls/dwrite/opentype.c

@@ -538,7 +538,7 @@ struct ot_lookup_table
     WORD subtable[1];
 };
 
-#define GLYPH_NOT_COVERED ((unsigned int)~0u)
+#define GLYPH_NOT_COVERED (~0u)
 
 struct ot_coverage_format1
 {