[libgit2-glib] meson: Simplify introspection detection

[Alberto Fanjul <albfan src gnome org>]

commit 488839125f95fe0fa9395f6ba23f334d5c8aa8f0
Author: Iñigo Martínez <inigomartinez gmail com>
Date:   Wed May 22 08:54:28 2019 +0200

    meson: Simplify introspection detection
    
    Introspection detection checks if the option is enabled and also
    if the `g-ir-scanner` is avaialable in the system.
    
    This check has been simplified by short circuiting the check.

 meson.build | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)
---
diff --git a/meson.build b/meson.build
index 7a473cb..21fb9da 100644
--- a/meson.build
+++ b/meson.build
@@ -128,11 +128,8 @@ gio_dep = dependency('gio-2.0', version: '>=' + glib_req)
 
 libgit2_dep = dependency('libgit2', version: '>= 0.25.0')
 
-enable_gir = get_option('introspection')
-if enable_gir
-  # XXX: Not nice, but probably our best option
-  enable_gir = find_program('g-ir-scanner', required: false).found()
-endif
+# XXX: Not nice, but probably our best option
+enable_gir = get_option('introspection') and find_program('g-ir-scanner', required: false).found()
 
 enable_vapi = get_option('vapi')
 if enable_vapi