[PATCH] Fix segmentation fault in dvipdfmx's pdfparse.c when handling object streams

[Karl Berry]

Hi Shuqiao - thanks much for the report and patch. Please, please,
provide the .xdv file that causes the crash. Otherwise we cannot verify
it or make a test case.

Also, for the future, (x)dvipdfm(x) reports are best sent to
dvipdfmx at tug.org, not the general tex-live list. There's no need to
resend this one, though.

Thanks,
Karl