[gxml] Fixed --enable-devhelp-docs without --enable-gtk-docs

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit 37a96d159323d6a618456dbe96bb5116b1f773fd
Author: Daniel Espinosa <esodan gmail com>
Date:   Mon May 4 09:34:11 2015 -0500

    Fixed --enable-devhelp-docs without --enable-gtk-docs

 configure.ac |   24 ++++++++++++------------
 1 files changed, 12 insertions(+), 12 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index f74f65b..6434f24 100644
--- a/configure.ac
+++ b/configure.ac
@@ -177,18 +177,6 @@ AC_ARG_ENABLE([gir-docs],
               AS_HELP_STRING([--enable-gir-docs],[Enable documented GIR generation]),
         [enable_gir_docs=$enableval], [enable_gir_docs=no])
 
-if test x$enable_devhelp_docs = xyes; then
-  if test x$have_valadoc = xno; then
-    AC_MSG_ERROR([valadoc and gtk-doc is required, to generate devhelp documentation. Use --enable-valadoc 
and --enable-gtk-doc])
-  fi
-fi
-
-if test x$enable_gir_docs = xyes; then
-  if test x$have_valadoc = xno; then
-    AC_MSG_ERROR([valadoc is required, to generate GIR documentation. Use --enable-valadoc and 
--enable-gtk-doc])
-  fi
-fi
-
 have_gtkdoc=no
 if test x$enable_gtk_docs = xyes; then
   if test x$have_valadoc = xyes; then
@@ -200,6 +188,18 @@ if test x$enable_gtk_docs = xyes; then
 fi
 
 
+if test x$enable_devhelp_docs = xyes; then
+  if test x$have_valadoc = xno -o x$have_gtkdoc = xno; then
+    AC_MSG_ERROR([valadoc and gtk-doc is required, to generate devhelp documentation. Use --enable-valadoc 
and --enable-gtk-doc])
+  fi
+fi
+
+if test x$enable_gir_docs = xyes; then
+  if test x$have_valadoc = xno; then
+    AC_MSG_ERROR([valadoc is required, to generate GIR documentation. Use --enable-valadoc and 
--enable-gtk-doc])
+  fi
+fi
+
 dnl Find yelp-build program
 enable_mallard_doc="no"
 girdocs=no