[gobject-introspection] test(1) uses '=' to test if strings are identical

[Colin Walters <walters src gnome org>]

commit 82870258bb3e8a284d893ac46a6afc2dd426d49a
Author: Patrick Welche <prlw1 cam ac uk>
Date:   Sat Apr 20 10:29:44 2013 +0100

    test(1) uses '=' to test if strings are identical
    
    https://bugzilla.gnome.org/show_bug.cgi?id=698438

 m4/python.m4 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/m4/python.m4 b/m4/python.m4
index cdd586c..ed5559d 100644
--- a/m4/python.m4
+++ b/m4/python.m4
@@ -63,7 +63,7 @@ AC_DEFUN([AM_CHECK_PYTHON_LIBS],
 [AC_REQUIRE([AM_CHECK_PYTHON_HEADERS])
 AC_MSG_CHECKING(for libraries required to link against libpython)
 dnl deduce PYTHON_LIBS
-if test "x$PYTHON_LIBS" == x; then
+if test "x$PYTHON_LIBS" = x; then
        PYTHON_LIBS=`$PYTHON-config --ldflags --libs`
 fi
 AC_SUBST(PYTHON_LIBS)