Cope with stray returns at the start of a JPEG stream.

Acrobat seems to cope, we should too. See normal_439.pdf for an
example.

1 files changed, 5 insertions, 0 deletions

diff --git a/fitz/filt_dctd.c b/fitz/filt_dctd.c
index 23744f01..1b588d2a 100644
--- a/fitz/filt_dctd.c
+++ b/fitz/filt_dctd.c
@@ -101,12 +101,17 @@ read_dctd(fz_stream *stm, unsigned char *buf, int len)
 
 	if (!state->init)
 	{
+		int c;
 		cinfo->client_data = state;
 		cinfo->err = &state->errmgr;
 		jpeg_std_error(cinfo->err);
 		cinfo->err->error_exit = error_exit;
 		jpeg_create_decompress(cinfo);
 
+		/* Skip over any stray returns at the start of the stream */
+		while ((c = fz_peek_byte(state->chain)) == '\n' || c == '\r')
+			(void)fz_read_byte(state->chain);
+
 		cinfo->src = &state->srcmgr;
 		cinfo->src->init_source = init_source;
 		cinfo->src->fill_input_buffer = fill_input_buffer;