[glom] configure.ac: Enable some more warnings.

[Murray Cumming <murrayc src gnome org>]

commit fdc662f7c9a4950ba02462b0f373fe287edd71bf
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Apr 29 12:45:01 2014 +0200

    configure.ac: Enable some more warnings.

 configure.ac |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 5562487..cd53236 100644
--- a/configure.ac
+++ b/configure.ac
@@ -210,12 +210,12 @@ MM_CONFIG_DOCTOOL_DIR([docs/libglom_reference])
 AC_LANG([C])
 MM_ARG_ENABLE_WARNINGS([GLOM_WFLAGS],
                        [-Wall],
-                       [-Wall -Wextra -Wno-missing-field-initializers -DGSEAL_ENABLE],
+                       [-pedantic -Wall -Wextra -Wformat-security -Wno-missing-field-initializers 
-DGSEAL_ENABLE],
                        [G GDK GDK_PIXBUF CAIRO PANGO GTK GDA])
 AC_LANG([C++])
 MM_ARG_ENABLE_WARNINGS([GLOM_WXXFLAGS],
                        [-Wall],
-                       [-Wall -Wextra -Wno-missing-field-initializers -DGSEAL_ENABLE],
+                       [-pedantic -Wall -Wextra -Wformat-security -Wno-missing-field-initializers 
-DGSEAL_ENABLE],
                        [G GDK GDK_PIXBUF GTK GDA GLIBMM GDKMM CAIROMM PANGOMM GTKMM SIGCXX LIBGDAMM])
 
 AC_CHECK_FUNCS([strptime])