[gtk-doc] mkpdf: python 2/3 compat fixes

[Stefan Sauer <stefkost src gnome org>]

commit 370e68c62e85874b6d47d06cddd2e6ab1aa6e323
Author: Stefan Sauer <ensonic users sf net>
Date:   Fri Jun 2 08:57:55 2017 +0200

    mkpdf: python 2/3 compat fixes

 gtkdoc/mkpdf.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtkdoc/mkpdf.py b/gtkdoc/mkpdf.py
index 953116d..5fd9ecb 100755
--- a/gtkdoc/mkpdf.py
+++ b/gtkdoc/mkpdf.py
@@ -74,7 +74,7 @@ def run(options):
         dbcmd = [config.dblatex] + dblatex_options
         pc = subprocess.Popen(dbcmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
         (stde, _) = pc.communicate()
-        for line in stde.split('\n'):
+        for line in stde.decode('utf-8').split('\n'):
             if not line.strip():
                 continue
             if 'programlisting or screen' in line: