--- tzip-1.12/tzip.cc	1998-09-12 05:57:00.000000000 +0100
+++ tzip-1.12/tzip.cc	2009-08-12 16:07:36.000000000 +0100
@@ -24,9 +24,9 @@
 
 static int      compressFile(FILE *iFile, FILE *oFile);
 static int      uncompressFile(FILE *iFile, FILE *oFile);
-static void     warn(char *fmt, ...);
-static void     pwarn(char *fmt, ...);
-static void     errQuit(char *fmt, ...);
+static void     warn(const char *fmt, ...);
+static void     pwarn(const char *fmt, ...);
+static void     errQuit(const char *fmt, ...);
 static void     help();
 
 
@@ -74,7 +74,7 @@
         case 'd': action = TZIP_UNCOMPRESS; break;
         case 'f': optForce = 1; break;
         case 'h': help(); break;
-        case 'i': incVal[atoi(argv[optind++])] = atoi(argv[optind++]); break;
+        case 'i': incVal[atoi(argv[optind])] = atoi(argv[optind+1]); optind += 2; break;
         case 'p': optPreserve = 1; break;
         case 'q': optQuiet = 1; break;
         case 't': action = TZIP_TEST;
@@ -344,7 +344,7 @@
 
 
 void
-warn(char *fmt, ...)
+warn(const char *fmt, ...)
 {
     char      buf[256];
     va_list   ap;
@@ -362,7 +362,7 @@
 
 
 void
-pwarn(char *fmt, ...)
+pwarn(const char *fmt, ...)
 {
     char     buf[256], buf1[256];
     va_list  ap;
@@ -380,7 +380,7 @@
 
 
 void
-errQuit(char *fmt, ...)
+errQuit(const char *fmt, ...)
 {
     char      buf[256];
     va_list   ap;