[gobject-introspection] meson: add join_paths for windows "\"

[Christoph Reiter <creiter src gnome org>]

commit 01701e40099a23cf2f8378361fc4bf85693e6da5
Author: Håvard Graff <havard graff gmail com>
Date:   Wed Nov 13 19:15:47 2019 +0000

    meson: add join_paths for windows "\"

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 88fb2f9e..d6231c5f 100644
--- a/meson.build
+++ b/meson.build
@@ -204,7 +204,7 @@ subdir('tests')
 install_data('Makefile.introspection', install_dir: join_paths(get_option('datadir'), 
'gobject-introspection-1.0'))
 install_data('m4/introspection.m4', install_dir: join_paths(get_option('datadir'), 'aclocal'))
 
-prefix = get_option('prefix')
+prefix = join_paths(get_option('prefix'))
 pkgconfig_conf = configuration_data()
 pkgconfig_conf.set('prefix', prefix)
 pkgconfig_conf.set('exec_prefix', '${prefix}')