Imported from libpng-1.4.0beta51.tar
diff --git a/pngwio.c b/pngwio.c
index 535a15d..29cb010 100644
--- a/pngwio.c
+++ b/pngwio.c
@@ -1,7 +1,7 @@
/* pngwio.c - functions for data output
*
- * Last changed in libpng 1.4.0 [March 9, 2009]
+ * Last changed in libpng 1.4.0 [March 21, 2009]
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -119,8 +119,7 @@
png_FILE_p io_ptr;
if (png_ptr == NULL) return;
io_ptr = (png_FILE_p)CVT_PTR((png_ptr->io_ptr));
- if (io_ptr != NULL && png_fileno(io_ptr) != -1)
- fflush(io_ptr);
+ fflush(io_ptr);
}
#endif
#endif
@@ -149,7 +148,10 @@
PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile
time, output_flush_fn will be ignored, although it must be
supplied for compatibility. May be NULL, in which case
- libpng's default function will be used. */
+ libpng's default function will be used, if
+ PNG_WRITE_FLUSH_SUPPORTED is defined. This is not
+ a good idea if io_ptr does not point to a standard
+ *FILE structure. */
void PNGAPI
png_set_write_fn(png_structp png_ptr, png_voidp io_ptr,
png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)