http://bugs.gentoo.org/323513

--- mozilla/modules/libpr0n/encoders/png/nsPNGEncoder.cpp
+++ mozilla/modules/libpr0n/encoders/png/nsPNGEncoder.cpp
@@ -111,9 +111,9 @@
 
   // initialize
   png_struct* png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,
-                                                png_voidp_NULL,
-                                                png_error_ptr_NULL,
-                                                png_error_ptr_NULL);
+                                                NULL,
+                                                NULL,
+                                                NULL);
   if (! png_ptr)
     return NS_ERROR_OUT_OF_MEMORY;
   png_info* info_ptr = png_create_info_struct(png_ptr);