[aravis] tests: build with -Wall

[Emmanuel Pacaud <emmanuel src gnome org>]

commit a70630d51fa072ce6f894694f07ed32d42dcbdac
Author: Emmanuel Pacaud <emmanuel gnome org>
Date:   Tue Aug 19 18:47:54 2014 +0200

    tests: build with -Wall

 tests/Makefile.am |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 6fdba2f..498d19a 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -2,6 +2,8 @@ include $(top_srcdir)/Makefile.decl
 
 AM_CPPFLAGS = -g -I$(top_srcdir)/src/ $(ARAVIS_CFLAGS)
 
+AM_CFLAGS = -Wall
+
 test_progs_ldadd =                                     \
        $(top_builddir)/src/libaravis- ARAVIS_API_VERSION@.la           \
        $(ARAVIS_LIBS)