zathura-pdf-mupdf: Add some debugging notes

[Leonardo Taccari <leot%NetBSD.org@localhost>]

Module Name:	pkgsrc-wip
Committed By:	Leonardo Taccari <leot%NetBSD.org@localhost>
Pushed By:	leot
Date:		Sat Sep 29 13:34:56 2018 +0200
Changeset:	f73fca7a27ce5342d1f3f29e003444a1fe26cdec

Modified Files:
	zathura-pdf-mupdf/TODO

Log Message:
zathura-pdf-mupdf: Add some debugging notes

To see a diff of this commit:
https://wip.pkgsrc.org/cgi-bin/gitweb.cgi?p=pkgsrc-wip.git;a=commitdiff;h=f73fca7a27ce5342d1f3f29e003444a1fe26cdec

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

diffstat:
 zathura-pdf-mupdf/TODO | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diffs:
diff --git a/zathura-pdf-mupdf/TODO b/zathura-pdf-mupdf/TODO
index 74e0e04d62..7499f8c9fd 100644
--- a/zathura-pdf-mupdf/TODO
+++ b/zathura-pdf-mupdf/TODO
@@ -1,6 +1,10 @@
-- PDF are not correctly rendered... and a lot of:
+PDF are not correctly rendered... and a lot of:
 
-   error: Rendering failed (page ...)
+ error: Rendering failed (page ...)
 
-  errors are printed... investigate that! (this is probably a
-  mistake in 1.14.0 port)
+errors are printed...
+
+Putting a breakpoint on pdf_page_render_to_buffer() function that
+is invoked as part of render_job() (defined in zathura)
+ZATHURA_ERROR_UNKNOWN is always returned because `image' argument
+is always NULL (hence `image == NULL' is true).