--- a/Meerwald/wm_zhu_d.c	Wed Apr 16 15:55:52 2008 +0200
+++ b/Meerwald/wm_zhu_d.c	Tue Apr 22 13:36:05 2008 +0200
@@ -1,6 +1,7 @@
 #include "wm.h"
 #include "dwt.h"
 #include "pgm.h"
+#include "sort.h"
 
 char *progname;
 
@@ -58,7 +59,7 @@
   int orig_rows, orig_cols, orig_format;
   gray orig_maxval;
   int rows, cols;
-  int row, col;
+  int row;
 
   double *watermark;
 
@@ -146,14 +147,15 @@
     exit(1);
   }
 
-  if (argc == 1 && *argv[0] != '-')
+  if (argc == 1 && *argv[0] != '-') {
     if ((in = fopen(argv[0], "rb")) == NULL) {
       fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
       exit(1);
     }
     else
       strcpy(input_name, argv[0]);
-
+  }
+  
   if (!orig) {
     fprintf(stderr, "%s: original image file not specified, use -i file option\n", progname);
     exit(1);