Make sure file_name contains '/' between SAVEDIR and the file name.

Duplicated slashes are not a problem.  Missing slashes are.

rogue4/main.c

@@ -78,7 +78,7 @@ char **envp;
         whoami[MAXSTR - 1] = '\0'; /* insurance */
         use_savedir = TRUE;
         /* look for savefile at SAVEDIR/UID-playername.r4sav */
-        if (snprintf(file_name, MAXSTR, "%s%d-%.10s.r4sav", SAVEDIR, 
+        if (snprintf(file_name, MAXSTR, "%s/%d-%.10s.r4sav", SAVEDIR, 
             md_getuid(), whoami) >= MAXSTR)
         {
             /* Name is too long- this shouldn't happen */