[vala] manual: xsltproc is required for all targets

[Rico Tzschichholz <ricotz src gnome org>]

commit 33c01e8be1b03d90d0f589b00ac2e37af93808cf
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Mon Mar 13 08:20:27 2017 +0100

    manual: xsltproc is required for all targets

 doc/manual/Makefile.am |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/doc/manual/Makefile.am b/doc/manual/Makefile.am
index ea885fb..3769283 100644
--- a/doc/manual/Makefile.am
+++ b/doc/manual/Makefile.am
@@ -8,7 +8,6 @@ if HAVE_XSLTPROC
 book_DATA = \
        devhelp/* \
        $(NULL)
-endif
 
 $(builddir)/devhelp/*: devhelp
 devhelp: manual.xml version.xml common.xsl devhelp.xsl xhtml.xsl default.css
@@ -60,6 +59,8 @@ pdf:
        @echo Install weasyprint and re-run ./configure to generate a PDF of the Vala manual
 endif
 
+endif
+
 mostlyclean-local:
        rm -rf devhelp
        rm -rf html