[devel] Imported from libpng-1.5.0beta17.tar
diff --git a/pngpriv.h b/pngpriv.h
index 921467b..ccd6aba 100644
--- a/pngpriv.h
+++ b/pngpriv.h
@@ -1,7 +1,7 @@
 
 /* pngpriv.h - private declarations for use inside libpng
  *
- * libpng version 1.5.0beta17 - April 1, 2010
+ * libpng version 1.5.0beta17 - April 17, 2010
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2010 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -117,7 +117,7 @@
 #define PNG_SHIFT               0x0008
 #define PNG_SWAP_BYTES          0x0010
 #define PNG_INVERT_MONO         0x0020
-#define PNG_DITHER              0x0040
+#define PNG_QUANTIZE            0x0040
 #define PNG_BACKGROUND          0x0080
 #define PNG_BACKGROUND_EXPAND   0x0100
                           /*    0x0200 unused */
@@ -601,9 +601,9 @@
 PNG_EXTERN void png_do_chop PNGARG((png_row_infop row_info, png_bytep row));
 #endif
 
-#ifdef PNG_READ_DITHER_SUPPORTED
-PNG_EXTERN void png_do_dither PNGARG((png_row_infop row_info,
-    png_bytep row, png_bytep palette_lookup, png_bytep dither_lookup));
+#ifdef PNG_READ_QUANTIZE_SUPPORTED
+PNG_EXTERN void png_do_quantize PNGARG((png_row_infop row_info,
+    png_bytep row, png_bytep palette_lookup, png_bytep quantize_lookup));
 
 #  ifdef PNG_CORRECT_PALETTE_SUPPORTED
 PNG_EXTERN void png_correct_palette PNGARG((png_structp png_ptr,