[frogr] Remove unnecessary bits from meson.build related to GtkHeaderBar

[Mario Sanchez Prada <msanchez src gnome org>]

commit 6c48f1eb55e072057b5531bd001a67e3502ec373
Author: Mario Sanchez Prada <msanchez gnome org>
Date:   Fri Jan 10 23:20:30 2020 +0100

    Remove unnecessary bits from meson.build related to GtkHeaderBar
    
    No need to check for GTK+ >= 3.12 when enabling the header bar
    when the minimum version for GTK+ is 3.16 in any case.

 meson.build | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)
---
diff --git a/meson.build b/meson.build
index c5e173d..f57f693 100644
--- a/meson.build
+++ b/meson.build
@@ -24,8 +24,8 @@ frogr_conf.set_quoted('LOCALEDIR', join_paths(prefix, localedir))
 compiler = meson.get_compiler('c')
 
 # Dependencies
-gtk_ver = '3.16'
 glib_ver = '2.44'
+gtk_ver = '3.16'
 soup_ver = '2.34'
 exif_ver = '0.6.14'
 xml2_ver = '2.6.8'
@@ -33,6 +33,7 @@ json_glib_ver = '1.2'
 gcrypt_ver = '1.5.0'
 
 glib = dependency('glib-2.0', version: '>=@0@'.format(glib_ver))
+gtk = dependency('gtk+-3.0', version: '>=@0@'.format(gtk_ver))
 soup = dependency('libsoup-2.4', version: '>=@0@'.format(soup_ver))
 exif = dependency('libexif', version: '>=@0@'.format(exif_ver))
 xml2 = dependency('libxml-2.0', version: '>=@0@'.format(xml2_ver))
@@ -49,14 +50,7 @@ frogr_conf.set_quoted('LIBGCRYPT_MIN_VERSION', gcrypt_ver)
 
 # Optional GtkHeaderBar
 if get_option('enable-header-bar')
-    gtk = dependency('gtk+-3.0', version: '>=3.12', required: false)
-    if gtk.found()
-        has_header_bar = true
-    endif
-endif
-
-if not get_variable('has_header_bar', false)
-    gtk = dependency('gtk+-3.0', version: '>=@0@'.format(gtk_ver))
+    has_header_bar = true
 endif
 
 frogr_conf.set10('USE_HEADER_BAR', get_variable('has_header_bar', false))