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-rw-r--r--drivers/png/pngwio.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/png/pngwio.c b/drivers/png/pngwio.c
index 95ffb3429f..cc55521452 100644
--- a/drivers/png/pngwio.c
+++ b/drivers/png/pngwio.c
@@ -1,8 +1,8 @@
/* pngwio.c - functions for data output
*
- * Last changed in libpng 1.5.0 [January 6, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.18 [February 6, 2014]
+ * Copyright (c) 1998-2002,2004,2006-2014 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.)
*
@@ -207,6 +207,8 @@ png_set_write_fn(png_structp png_ptr, png_voidp io_ptr,
# else
png_ptr->output_flush_fn = output_flush_fn;
# endif
+#else
+ PNG_UNUSED(output_flush_fn)
#endif /* PNG_WRITE_FLUSH_SUPPORTED */
/* It is an error to read while writing a png file */