Fix folder.c warnings when compiling on windows

src/folder.c

@@ -91,6 +91,7 @@ static void get_install_dir (char *install_dir, const char *exec_path)
   }
 }
 
+#if defined (_POSIX)
 static void get_profile_dir (char *profile_dir, const char *home_dir)
 {
   snprintf (profile_dir, HCBUFSIZ_TINY - 1, "%s/%s", home_dir, DOT_HASHCAT);
@@ -100,6 +101,7 @@ static void get_session_dir (char *session_dir, const char *profile_dir)
 {
   snprintf (session_dir, HCBUFSIZ_TINY - 1, "%s/%s", profile_dir, SESSIONS_FOLDER);
 }
+#endif
 
 int count_dictionaries (char **dictionary_files)
 {