[libgxps] tools: fix typo in Makefile.am

[Paolo Borelli <pborelli src gnome org>]

commit 9c9ccea6dc9bf49225cee5c3cfd84c8c55bacfba
Author: Ignacio Casal Quinteiro <icq gnome org>
Date:   Tue Jan 17 09:05:23 2017 +0100

    tools: fix typo in Makefile.am

 tools/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/tools/Makefile.am b/tools/Makefile.am
index d6f971d..b1326cb 100644
--- a/tools/Makefile.am
+++ b/tools/Makefile.am
@@ -24,7 +24,7 @@ tools_cppflags = \
 
 tools_cflags = \
        $(GXPS_CFLAGS)  \
-       $(WARN_CFLAGS)
+       $(WARN_CFLAGS) \
        $(AM_CFLAGS)
 
 if HAVE_LIBPNG