wrong type in thumbs customization

[Frederik Fouvry]

Symptoms:

In thumbs.el, several type specifications are wrong (resulting in
a "mismatch" message in the Customize buffer).  A patch is
attached:

Index: lisp/thumbs.el
===================================================================
RCS file: /cvsroot/emacs/emacs/lisp/thumbs.el,v
retrieving revision 1.14
diff -c -r1.14 thumbs.el
*** lisp/thumbs.el      6 Jun 2005 15:44:31 -0000       1.14
--- lisp/thumbs.el      7 Jun 2005 16:51:47 -0000
***************
*** 78,90 ****
  
  (defcustom thumbs-per-line 5
    "*Number of thumbnails per line to show in directory."
!   :type 'string
    :group 'thumbs)
  
  (defcustom thumbs-thumbsdir-max-size 50000000
    "Max size for thumbnails directory.
  When it reaches that size (in bytes), a warning is sent."
!   :type 'string
    :group 'thumbs)
  
  (defcustom thumbs-conversion-program
--- 78,90 ----
  
  (defcustom thumbs-per-line 5
    "*Number of thumbnails per line to show in directory."
!   :type 'integer
    :group 'thumbs)
  
  (defcustom thumbs-thumbsdir-max-size 50000000
    "Max size for thumbnails directory.
  When it reaches that size (in bytes), a warning is sent."
!   :type 'integer
    :group 'thumbs)
  
  (defcustom thumbs-conversion-program
***************
*** 105,117 ****
  
  (defcustom thumbs-relief 5
    "*Size of button-like border around thumbnails."
!   :type 'string
    :group 'thumbs)
  
  (defcustom thumbs-margin 2
    "*Size of the margin around thumbnails.
  This is where you see the cursor."
!   :type 'string
    :group 'thumbs)
  
  (defcustom thumbs-thumbsdir-auto-clean t
--- 105,117 ----
  
  (defcustom thumbs-relief 5
    "*Size of button-like border around thumbnails."
!   :type 'integer
    :group 'thumbs)
  
  (defcustom thumbs-margin 2
    "*Size of the margin around thumbnails.
  This is where you see the cursor."
!   :type 'integer
    :group 'thumbs)
  
  (defcustom thumbs-thumbsdir-auto-clean t
***************
*** 123,129 ****
  
  (defcustom thumbs-image-resizing-step 10
    "Step by which to resize image."
!   :type 'string
    :group 'thumbs)
  
  (defcustom thumbs-temp-dir
--- 123,129 ----
  
  (defcustom thumbs-image-resizing-step 10
    "Step by which to resize image."
!   :type 'integer
    :group 'thumbs)
  
  (defcustom thumbs-temp-dir