gamnit: don't crash if there is no sound

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/lib/gamnit/display_linux.nit b/lib/gamnit/display_linux.nit
index e3ab243..dcfd963 100644 (file)
--- a/lib/gamnit/display_linux.nit
+++ b/lib/gamnit/display_linux.nit
@@ -89,12 +89,12 @@ redef class GamnitDisplay
 
                # Audio support
                var inited = mix.initialize(mix_init_flags)
-               assert inited != mix_init_flags else
+               if inited != mix_init_flags then
                        print_error "Failed to load SDL2 mixer format supports: {mix.error}"
                end
 
-               var opened = mix.open_audio(44100, mix.default_format, 2, 1024)
-               assert opened else
+               var open = mix.open_audio(44100, mix.default_format, 2, 1024)
+               if not open then
                        print_error "Failed to initialize SDL2 mixer: {mix.error}"
                end
 
@@ -108,8 +108,8 @@ redef class GamnitDisplay
 
        # SDL2 mixer initialization flags
        #
-       # Defaults to all available formats.
-       var mix_init_flags: MixInitFlags = mix.flac | mix.mod | mix.mp3 | mix.ogg is lazy, writable
+       # Defaults to FLAC, MP3 and OGG.
+       var mix_init_flags: MixInitFlags = mix.flac | mix.mp3 | mix.ogg is lazy, writable
 
        # Close the SDL display
        fun close_sdl