...

diff --git a/coders/sfw.c b/coders/sfw.c
index dddf02d652fa39c1f47339740f320fd2a8acb15f..f0f80279ee7915841be8efb2fd6a32ba936a7d23 100644 (file)
--- a/coders/sfw.c
+++ b/coders/sfw.c
@@ -324,7 +324,7 @@ static Image *ReadSFWImage(const ImageInfo *image_info,ExceptionInfo *exception)
   (void) extent;
   extent=fwrite(HuffmanTable,1,sizeof(HuffmanTable)/sizeof(*HuffmanTable),file);
   extent=fwrite(offset+1,(size_t) (data-offset),1,file);
-  status=ferror(file) == -1 ? MagickFalse : MagickTrue;
+  status=ferror(file) != 0 ? MagickFalse : MagickTrue;
   (void) fclose(file);
   (void) close(unique_file);
   buffer=(unsigned char *) RelinquishMagickMemory(buffer);