[dia: 35/105] #19: Make dblatex and xsltproc optional.

[Zander <zbrown src gnome org>]

commit a0d8ae0a9fe767866b690190c90890cfa4c6e169
Author: eduard <eduard diabuild my.domain>
Date:   Fri Dec 28 10:18:26 2018 +0000

    #19: Make dblatex and xsltproc optional.
    
      - This should have been added as part of 3cbcd19f
        ("only call xsltproc and dblatex if found").

 doc/meson.build | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/doc/meson.build b/doc/meson.build
index 08a6771c..9631a641 100644
--- a/doc/meson.build
+++ b/doc/meson.build
@@ -1,5 +1,5 @@
-dblatex = find_program('dblatex')
-xsltproc = find_program('xsltproc')
+dblatex = find_program('dblatex', required: false)
+xsltproc = find_program('xsltproc', required: false)
 
 DB2MAN = 'http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl'