[devel] Fixed incorrect #ifdef in pngset.c

PNG_UNKNOWN_CHUNK_SUPPORTED should be PNG_HANDLE_AS_UNKNOWN_SUPPORTED.

ANNOUNCE

@@ -532,6 +532,7 @@ version 1.4.0beta74 [August 8, 2009]
 
 version 1.4.0beta75 [August 21, 2009]
   Removed an extra png_debug() recently added to png_write_find_filter().
+  Fixed incorrect #ifdef in pngset.c regarding unknown chunk support.
 
 version 1.4.0betaN [future]
   Build shared libraries with -lz and sometimes -lm.

CHANGES

@@ -2209,6 +2209,7 @@ version 1.4.0beta74 [August 8, 2009]
 
 version 1.4.0beta75 [August 21, 2009]
   Removed an extra png_debug() recently added to png_write_find_filter().
+  Fixed incorrect #ifdef in pngset.c regarding unknown chunk support.
 
 version 1.4.0betaN [future]
   Build shared libraries with -lz and sometimes -lm.

pngset.c

 
 /* pngset.c - storage of image information into info struct
  *
- * Last changed in libpng 1.4.0 [August 16, 2009]
+ * Last changed in libpng 1.4.0 [August 21, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -1034,7 +1034,7 @@ png_set_sPLT(png_structp png_ptr,
 }
 #endif /* PNG_sPLT_SUPPORTED */
 
-#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
+#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
 void PNGAPI
 png_set_unknown_chunks(png_structp png_ptr,
    png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)