Bug 208607 - configure away unused png write code. Patch by

randeg@alum.rpi.edu, r=pavlov, sr=tor

modules/libimg/png/MOZCHANGES

@@ -8,3 +8,4 @@ Changes made to pristine png source by mozilla.org developers.
 
 2003/06/11  -- add mozpngconf.h (bug 208607)
 
+2003/07/03  -- enable PNG_NO_WRITE_SUPPORTED in mozpngconf.h (bug 208607)

modules/libimg/png/mozpngconf.h

@@ -68,8 +68,6 @@
 #define PNG_NO_READ_OPT_PLTE
 #define PNG_NO_MNG_FEATURES
 
-#define PNG_NO_WRITE_TRANSFORMS
-#define PNG_NO_WRITE_EMPTY_PLTE
-#define PNG_NO_WRITE_ANCILLARY_CHUNKS
+#define PNG_NO_WRITE_SUPPORTED
 
 #endif