Add safe forward char.

Author: jcs090218

isearch-project.el

@@ -276,7 +276,8 @@ SEARCH-STR : Search string."
            (isearch-project-isearch-yank-string search-str)))
         ((memq this-command '(isearch-project-forward-symbol-at-point))
          (when (char-or-string-p isearch-project-thing-at-point)
-           (forward-char 1)
+           (unless (= (point) (point-max))
+             (forward-char 1))
            (forward-symbol -1)
            (isearch-project-isearch-yank-string isearch-project-thing-at-point)))))