[geocode-glib] build: Check for libm in configure (again)

[Bastien Nocera <hadess src gnome org>]

commit d1a2a7e5fc94a6a50dbe8acdc860f9e633ba1d66
Author: Bastien Nocera <hadess hadess net>
Date:   Mon Apr 15 14:33:50 2013 +0200

    build: Check for libm in configure (again)
    
    As we did in 0e0e387356b340d2f539ad20696237fc94259b08 which
    got broken by 4d78c0ecc8c0a6a92cd29da0d0a55fc546e5463d.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=707804

 configure.ac |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 1e85b48..f2cd4b6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -56,6 +56,8 @@ AM_GLIB_DEFINE_LOCALEDIR(GEOCODE_GLIB_LOCALEDIR)
 dnl gtk-doc checks
 GTK_DOC_CHECK([1.13],[--flavour no-tmpl])
 
+AC_CHECK_LIB([m],[atan2])
+
 dnl Requires for the library
 PKG_CHECK_MODULES(GEOCODE,
                  gio-2.0 >= 2.34