[gupnp-igd] Fix autotools warnings

[Olivier Crête <Tester src gnome org>]

commit 9b5fd5ce1b9962cabd5e532b2bf2a388c7858dfc
Author: Olivier Crête <olivier crete collabora com>
Date:   Mon Jun 24 16:33:10 2013 -0400

    Fix autotools warnings

 configure.ac    |    1 +
 doc/Makefile.am |    4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 9753708..3178e84 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3,6 +3,7 @@ AC_INIT(gupnp-igd, 0.2.2, http://www.gupnp.org/)
 AM_INIT_AUTOMAKE()
 AC_CONFIG_SRCDIR(libgupnp-igd/gupnp-simple-igd.h)
 AM_CONFIG_HEADER(config.h)
+AC_CONFIG_MACRO_DIR([m4])
 
 AC_ISC_POSIX
 AC_PROG_CC
diff --git a/doc/Makefile.am b/doc/Makefile.am
index 86e164c..de8e220 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -65,9 +65,9 @@ expand_content_files=
 # CFLAGS and LDFLAGS for compiling gtkdoc-scangobj with your library.
 # Only needed if you are using gtkdoc-scangobj to dynamically query widget
 # signals and properties.
-# e.g. INCLUDES=-I$(top_srcdir) -I$(top_builddir) $(GTK_DEBUG_FLAGS)
+# e.g. AM_CPPFLAGS=-I$(top_srcdir) -I$(top_builddir) $(GTK_DEBUG_FLAGS)
 # e.g. GTKDOC_LIBS=$(top_builddir)/gtk/$(gtktargetlib)
-INCLUDES= $(LIBGUPNP_CFLAGS) -I$(top_srcdir)
+AM_CPPFLAGS= $(LIBGUPNP_CFLAGS) -I$(top_srcdir)
 GTKDOC_LIBS= \
        $(top_builddir)/libgupnp-igd/libgupnp-igd-1.0.la \
         $(LIBGUPNP_LIBS)