freetype: fix strikeout style corruption

modules/text_renderer/freetype.c

@@ -845,7 +845,7 @@ static inline int RenderAXYZ( filter_t *p_filter,
                                 BlendPixel );
 
                 /* underline/strikethrough are only rendered for the normal glyph */
-                if( g == 2 && ch->i_line_thickness > 0 )
+                if( g == 2 && ch->i_line_thickness > 0 && p_glyph->bitmap.rows )
                     BlendAXYZLine( p_picture,
                                    i_glyph_x, i_glyph_y + p_glyph->top,
                                    i_a, i_x, i_y, i_z,

modules/text_renderer/text_layout.c

@@ -1021,6 +1021,12 @@ static int LayoutLine( filter_t *p_filter,
                 i_line_offset -=
                     abs( FT_FLOOR( FT_MulFix( p_face->descender * 2,
                                               p_face->size->metrics.y_scale ) ) );
+                p_bitmaps->glyph_bbox.yMax =
+                    __MAX( p_bitmaps->glyph_bbox.yMax,
+                           - i_line_offset );
+                p_bitmaps->glyph_bbox.yMin =
+                    __MIN( p_bitmaps->glyph_bbox.yMin,
+                           i_line_offset - i_line_thickness );
             }
             else if( i_line_thickness > 0 )
             {