Remove nonnullret deadcode: vim_strsave.

src/nvim/edit.c

@@ -1633,11 +1633,6 @@ change_indent (
    * put it back again the way we wanted it.
    */
   if (State & VREPLACE_FLAG) {
-    /* If orig_line didn't allocate, just return.  At least we did the job,
-     * even if you can't backspace. */
-    if (orig_line == NULL)
-      return;
-
     /* Save new line */
     new_line = vim_strsave(get_cursor_line_ptr());
 

src/nvim/eval.c

@@ -11628,18 +11628,12 @@ static void f_or(typval_T *argvars, typval_T *rettv)
  */
 static void f_pathshorten(typval_T *argvars, typval_T *rettv)
 {
-  char_u      *p;
-
   rettv->v_type = VAR_STRING;
-  p = get_tv_string_chk(&argvars[0]);
-  if (p == NULL)
-    rettv->vval.v_string = NULL;
-  else {
-    p = vim_strsave(p);
-    rettv->vval.v_string = p;
-    if (p != NULL)
-      shorten_dir(p);
+  rettv->vval.v_string = get_tv_string_chk(&argvars[0]);
+  if (!rettv->vval.v_string) {
+    return;
   }
+  rettv->vval.v_string = shorten_dir(vim_strsave(rettv->vval.v_string));
 }
 
 /*

src/nvim/ex_cmds.c

@@ -4742,7 +4742,6 @@ void ex_help(exarg_T *eap)
   tag = vim_strsave(matches[i]);
   FreeWild(num_matches, matches);
 
-
   /*
    * Re-use an existing help window or open a new one.
    * Always open a new one for ":tab help".
@@ -4805,8 +4804,7 @@ void ex_help(exarg_T *eap)
    * It is needed for do_tag top open folds under the cursor. */
   KeyTyped = old_KeyTyped;
 
-  if (tag != NULL)
-    do_tag(tag, DT_HELP, 1, FALSE, TRUE);
+  do_tag(tag, DT_HELP, 1, FALSE, TRUE);
 
   /* Delete the empty buffer if we're not using it.  Careful: autocommands
    * may have jumped to another window, check that the buffer is not in a

src/nvim/indent_c.c

@@ -1593,8 +1593,6 @@ int get_c_indent(void)
    * This is required, because only the most recent line obtained with
    * ml_get is valid! */
   linecopy = vim_strsave(ml_get(cur_curpos.lnum));
-  if (linecopy == NULL)
-    return 0;
 
   /*
    * In insert mode and the cursor is on a ')' truncate the line at the

src/nvim/path.c

@@ -239,33 +239,31 @@ int vim_ispathlistsep(int c)
  * Shorten the path of a file from "~/foo/../.bar/fname" to "~/f/../.b/fname"
  * It's done in-place.
  */
-void shorten_dir(char_u *str)
+char_u *shorten_dir(char_u *str)
 {
-  char_u      *tail, *s, *d;
-  int skip = FALSE;
-
-  tail = path_tail(str);
-  d = str;
-  for (s = str;; ++s) {
+  char_u *tail = path_tail(str);
+  char_u *d = str;
+  bool skip = false;
+  for (char_u *s = str;; ++s) {
     if (s >= tail) {                /* copy the whole tail */
       *d++ = *s;
       if (*s == NUL)
         break;
     } else if (vim_ispathsep(*s)) {       /* copy '/' and next char */
       *d++ = *s;
-      skip = FALSE;
+      skip = false;
     } else if (!skip) {
       *d++ = *s;                    /* copy next char */
       if (*s != '~' && *s != '.')       /* and leading "~" and "." */
-        skip = TRUE;
+        skip = true;
       if (has_mbyte) {
         int l = mb_ptr2len(s);
-
         while (--l > 0)
           *d++ = *++s;
       }
     }
   }
+  return str;
 }
 
 /*

src/nvim/screen.c

@@ -7795,7 +7795,7 @@ static void draw_tabline(void)
       if (room > 0) {
         /* Get buffer name in NameBuff[] */
         get_trans_bufname(cwp->w_buffer);
-        shorten_dir(NameBuff);
+        (void)shorten_dir(NameBuff);
         len = vim_strsize(NameBuff);
         p = NameBuff;
         if (has_mbyte)