Add missing :type to a few options.

* ox-texinfo.el (org-texinfo-def-table-markup):
* org-inlinetask.el (org-inlinetask-show-first-star):
* ob-maxima.el (org-babel-maxima-command): Add type.

Thanks to Glenn Morris for reporting this.

lisp/ob-maxima.el

@@ -43,7 +43,8 @@
 (defcustom org-babel-maxima-command
   (if (boundp 'maxima-command) maxima-command "maxima")
   "Command used to call maxima on the shell."
-  :group 'org-babel)
+  :group 'org-babel
+  :type 'string)
 
 (defun org-babel-maxima-expand (body params)
   "Expand a block of Maxima code according to its header arguments."

lisp/org-inlinetask.el

@@ -103,7 +103,8 @@ the value of this variable."
   "Non-nil means display the first star of an inline task as additional marker.
 When nil, the first star is not shown."
   :tag "Org Inline Tasks"
-  :group 'org-structure)
+  :group 'org-structure
+  :type 'boolean)
 
 (defvar org-odd-levels-only)
 (defvar org-keyword-time-regexp)

lisp/ox-texinfo.el

@@ -288,7 +288,9 @@ When nil, no transformation is made."
 	  (const :tag "No formatting")))
 
 (defcustom org-texinfo-def-table-markup "@samp"
-  "Default setting for @table environments.")
+  "Default setting for @table environments."
+  :group 'org-export-texinfo
+  :type 'string)
 
 ;;; Text markup