...

diff --git a/coders/png.c b/coders/png.c
index 59c7057ccf56cef80f44b0669ee5d338db794a4a..c80b4bcdcdf9935fa5c5c194695c94314e376d6a 100644 (file)
--- a/coders/png.c
+++ b/coders/png.c
@@ -10306,7 +10306,7 @@ static MagickBooleanType WriteOnePNGImage(MngInfo *mng_info,
       if (ping_bit_depth < (int) mng_info->write_png_depth)
          ping_bit_depth = mng_info->write_png_depth;
     }
-
+  (void) old_bit_depth;
   image_depth=ping_bit_depth;
 
   if (logging != MagickFalse)