[PATCH] meson.build: tweak sdl-image error message

[Sergei Trofimovich]

Before the change missing SDL was reported as:

    ../meson.build:253:4: ERROR: Expected 1 arguments, got 2.

After the error as:

    ../meson.build:258:4: ERROR: Problem encountered: sdl-image required, but 
SDL was not found

CC: Paolo Bonzini <pbonzini@redhat.com>
CC: "Marc-André Lureau" <marcandre.lureau@redhat.com>
CC: "Philippe Mathieu-Daudé" <philmd@redhat.com>
CC: Rafael Kitover <rkitover@gmail.com>
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
---
 meson.build | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/meson.build b/meson.build
index 04e070bb3b..7fd2a903c5 100644
--- a/meson.build
+++ b/meson.build
@@ -255,8 +255,8 @@ if sdl.found()
                          method: 'pkg-config', static: enable_static)
 else
   if get_option('sdl_image').enabled()
-    error('sdl-image required, but SDL was @0@',
-          get_option('sdl').disabled() ? 'disabled' : 'not found')
+    error('sdl-image required, but SDL was @0@'.format(
+          get_option('sdl').disabled() ? 'disabled' : 'not found'))
   endif
   sdl_image = not_found
 endif
-- 
2.28.0