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pngenc: Call png_jmpbuf() instead of accessing png_struct_ptr directly
Fixes #612700 (again)
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@ -269,7 +269,7 @@ gst_pngenc_chain (GstPad * pad, GstBuffer * buf)
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}
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/* non-0 return is from a longjmp inside of libpng */
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if (setjmp (pngenc->png_struct_ptr->jmpbuf) != 0) {
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if (setjmp (png_jmpbuf (pngenc->png_struct_ptr)) != 0) {
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gst_buffer_unref (buf);
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png_destroy_write_struct (&pngenc->png_struct_ptr, &pngenc->png_info_ptr);
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GST_ELEMENT_ERROR (pngenc, LIBRARY, FAILED, (NULL),
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