---- libpng-1.5.7/scripts/symbols.def.orig 2011-12-15 16:45:34.000000000 +0100
-+++ libpng-1.5.7/scripts/symbols.def 2011-12-18 19:44:57.326436207 +0100
-@@ -239,4 +239,24 @@
- png_get_cHRM_XYZ_fixed @231
- png_set_cHRM_XYZ @232
- png_set_cHRM_XYZ_fixed @233
- png_set_check_for_invalid_index @234
-+ png_get_acTL @235
-+ png_set_acTL @236
-+ png_get_num_frames @237
-+ png_get_num_plays @238
-+ png_get_next_frame_fcTL @239
-+ png_set_next_frame_fcTL @240
-+ png_get_next_frame_width @241
-+ png_get_next_frame_height @242
-+ png_get_next_frame_x_offset @243
-+ png_get_next_frame_y_offset @244
-+ png_get_next_frame_delay_num @245
-+ png_get_next_frame_delay_den @246
-+ png_get_next_frame_dispose_op @247
-+ png_get_next_frame_blend_op @248
-+ png_get_first_frame_is_hidden @249
-+ png_set_first_frame_is_hidden @250
-+ png_read_frame_head @251
-+ png_set_progressive_frame_fn @252
-+ png_write_frame_head @253
-+ png_write_frame_tail @254