[balsa] Fix install directories

[Peter Bloomfield <peterb src gnome org>]

commit 096f86f675f10773b7753bd2b0fe0fdfbc2ec150
Author: Peter Bloomfield <PeterBloomfield bellsouth net>
Date:   Wed Sep 13 16:19:54 2017 -0400

    Fix install directories
    
        * meson.build: fix install directory.
        * ui/meson.build: ditto.

 ChangeLog      |    5 +++++
 meson.build    |    4 ++--
 ui/meson.build |    4 ++--
 3 files changed, 9 insertions(+), 4 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index fd62f23..6d3c991 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2017-09-13  Peter Bloomfield  <pbloomfield bellsouth net>
+
+       * meson.build: fix install directory.
+       * ui/meson.build: ditto.
+
 2017-08-29  Peter Bloomfield  <pbloomfield bellsouth net>
 
        * libbalsa/misc.c (libbalsa_get_domainname): use
diff --git a/meson.build b/meson.build
index e58de49..f345c9b 100644
--- a/meson.build
+++ b/meson.build
@@ -792,8 +792,8 @@ endforeach
 
 if with_gtksourceview
   gtksourceview_files = ['balsa-mail.lang', 'balsa-mail-style.xml']
-  gtksourceviewdir = join_paths(get_option('datadir'), 'gtksourceview-3.0')
-  install_data(gtksourceview_files, install_dir : gtksourceviewdir)
+  gtksourceview_dir = join_paths(get_option('datadir'), 'balsa', 'gtksourceview-3.0')
+  install_data(gtksourceview_files, install_dir : gtksourceview_dir)
 endif
 ####################### Autotools stuff below this line #######################
 #
diff --git a/ui/meson.build b/ui/meson.build
index 871b413..0376b25 100644
--- a/ui/meson.build
+++ b/ui/meson.build
@@ -8,5 +8,5 @@ balsa_ui_files = [
   'ab-main.ui'
   ]
 
-balsa_uidir = get_option('datadir') + 'ui'
-install_data(balsa_ui_files, install_dir : balsa_uidir)
+balsa_ui_dir = join_paths(get_option('datadir'), 'balsa', 'ui')
+install_data(balsa_ui_files, install_dir : balsa_ui_dir)