COMP: Remove warnings

Utilities/cmtar/append.c

@@ -65,8 +65,8 @@ tar_append_file(TAR *t, char *realname, char *savename)
 {
   struct stat s;
   libtar_hashptr_t hp;
-  tar_dev_t *td = NULL;
-  tar_ino_t *ti = NULL;
+  tar_dev_t *td;
+  tar_ino_t *ti;
 #if !defined(_WIN32) || defined(__CYGWIN__)
   int i;
 #else

Utilities/cmtar/extract.c

@@ -329,7 +329,7 @@ int
 tar_extract_hardlink(TAR * t, char *realname)
 {
   char *filename;
-  char *linktgt = NULL;
+  char *linktgt;
   linkname_t *lnp;
   libtar_hashptr_t hp;
   char buf[T_BLOCKSIZE];

Utilities/cmtar/libtar.c

@@ -318,10 +318,10 @@ usage()
 int
 main(int argc, char *argv[])
 {
-  char *tarfile = NULL;
+  char* tarfile;
   char *rootdir = NULL;
   int c;
-  int mode = 0;
+  int mode;
   libtar_list_t *l;
 #if defined(_WIN32) && !defined(__CYGWIN__)
    int optind;
@@ -329,6 +329,7 @@ main(int argc, char *argv[])
   progname = basename(argv[0]);
 
 #if !defined(_WIN32) || defined(__CYGWIN__)
+  mode = 0;
   while ((c = getopt(argc, argv, "cC:gtvVxz")) != -1)
     switch (c)
     {