libjpeg-turbo: update to 2.1.x rev 0734e34f6

media/libjpeg/jpeglib.h

@@ -5,7 +5,8 @@
  * Copyright (C) 1991-1998, Thomas G. Lane.
  * Modified 2002-2009 by Guido Vollbeding.
  * libjpeg-turbo Modifications:
- * Copyright (C) 2009-2011, 2013-2014, 2016-2017, 2020, D. R. Commander.
+ * Copyright (C) 2009-2011, 2013-2014, 2016-2017, 2020, 2023-2024,
+             D. R. Commander.
  * Copyright (C) 2015, Google, Inc.
  * For conditions of distribution and use, see the accompanying README.ijg
  * file.
@@ -15,6 +16,16 @@
  * and perhaps jerror.h if they want to know the exact error codes.
  */
 
+/* NOTE: This header file does not include stdio.h, despite the fact that it
+ * uses FILE and size_t.  That is by design, since the libjpeg API predates the
+ * widespread adoption of ANSI/ISO C.  Referring to libjpeg.txt, it is a
+ * documented requirement that calling programs "include system headers that
+ * define at least the typedefs FILE and size_t" before including jpeglib.h.
+ * Technically speaking, changing that requirement by including stdio.h here
+ * would break backward API compatibility.  Please do not file bug reports,
+ * feature requests, or pull requests regarding this.
+ */
+
 #ifndef JPEGLIB_H
 #define JPEGLIB_H
 
@@ -238,7 +249,8 @@ typedef enum {
   JCS_EXT_BGRA,           /* blue/green/red/alpha */
   JCS_EXT_ABGR,           /* alpha/blue/green/red */
   JCS_EXT_ARGB,           /* alpha/red/green/blue */
-  JCS_RGB565              /* 5-bit red/6-bit green/5-bit blue */
+  JCS_RGB565              /* 5-bit red/6-bit green/5-bit blue
+                             [decompression only] */
 } J_COLOR_SPACE;
 
 /* DCT/IDCT algorithm options. */