Correctly extract component data from "Image and tile size" (SIZ) markers in JPEG 2000 images
Correctly extract component data from "Image and tile size" (SIZ) markers in JPEG 2000 images

This is something that I noticed while attempting to debug https://bugzilla.mozilla.org/show_bug.cgi?id=1374945.
Just looking at the code, the `YRsiz` parameter seemed immediately wrong and the fact that every component used the *same* data also looked strange.
Comparing with the specification, see https://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-T.800-200208-S!!PDF-E&type=items#page=37, confirmed that this is indeed incorrect.

Note that I haven't got any example of a PDF file that is fixed by this patch, but that might be more luck than anything else. Manually checking a couple of files with included JPEG 2000 images, the `Csiz`/`XRsiz`/`YRsiz` parameters were `1` which could explain why this hasn't been an issue before.

Obviously we shouldn't generally make changes to `core` code without adding tests, but in this case I'm simply not sure how to obtain/create one. However, since the existing code doesn't make sense this patch could hopefully be deemed acceptable anyway.

Rob--W/pdf.js,macroplant/pdf.js,showpad/mozilla-pdf.js,timvandermeij/pdf.js,macroplant/pdf.js,timvandermeij/pdf.js,macroplant/pdf.js,nawawi/pdf.js,Snuffleupagus/pdf.js,mainegreen/pdf.js,Shoobx/pdf.js,Snuffleupagus/pdf.js,caremerge/pdf.js,mozilla/pdf.js,Rob--W/pdf.js,showpad/mozilla-pdf.js,Shoobx/pdf.js,mozilla/pdf.js,nawawi/pdf.js,nawawi/pdf.js,mainegreen/pdf.js,showpad/mozilla-pdf.js,Snuffleupagus/pdf.js,mozilla/pdf.js,xavier114fch/pdf.js,Shoobx/pdf.js,mukulmishra18/pdf.js,caremerge/pdf.js,timvandermeij/pdf.js,xavier114fch/pdf.js,mukulmishra18/pdf.js