[retro-gtk] pixelf-format: Use G_MAXINT rather than -1

[Adrien Plazas <aplazas src gnome org>]

commit 5af6b3ee87695dfccc993c29a54c461c95d55149
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Sun Aug 1 14:19:22 2021 +0200

    pixelf-format: Use G_MAXINT rather than -1
    
    This is clearer and safer.

 shared/retro-pixel-format-private.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/shared/retro-pixel-format-private.h b/shared/retro-pixel-format-private.h
index d59891e..2e16640 100644
--- a/shared/retro-pixel-format-private.h
+++ b/shared/retro-pixel-format-private.h
@@ -25,7 +25,7 @@ typedef enum
   RETRO_PIXEL_FORMAT_XRGB1555,
   RETRO_PIXEL_FORMAT_XRGB8888,
   RETRO_PIXEL_FORMAT_RGB565,
-  RETRO_PIXEL_FORMAT_UNKNOWN = -1,
+  RETRO_PIXEL_FORMAT_UNKNOWN = G_MAXINT,
 } RetroPixelFormat;
 
 gboolean retro_pixel_format_to_gl (RetroPixelFormat  pixel_format,