Fixed compiler warnings, including one small bug in ob-lilypond

* lisp/ob-lilypond.el (ly-compile-lilyfile): Fixed misplaced comma in a
quoting expression.

* lisp/org-pcomplete.el: added missing defvar definitions for org vars

* lisp/org-src.el: added declare-function line for org-babel-tangle

* lisp/ob.el (org-scan-tags): protected the variable tags-list with a let
(other) added missing defvar declarations.

TINYCHANGE

lisp/ob-lilypond.el

@@ -223,7 +223,7 @@ FILE-NAME is full path to lilypond (.ly) file"
         (arg-11 file-name))
     (if test
         `(,arg-1 ,arg-2 ,arg-3 ,arg-4 ,arg-5 ,arg-6
-                 ,arg-7 ,arg-8 ,arg-9 ,arg-10, arg-11)
+                 ,arg-7 ,arg-8 ,arg-9 ,arg-10 ,arg-11)
       (call-process
        arg-1 arg-2 arg-3 arg-4 arg-5 arg-6
        arg-7 arg-8 arg-9 arg-10 arg-11))))

lisp/org-pcomplete.el

@@ -50,6 +50,9 @@
   :tag "Org"
   :group 'org)
 
+(defvar org-drawer-regexp)
+(defvar org-property-re)
+
 (defun org-thing-at-point ()
   "Examine the thing at point and let the caller know what it is.
 The return value is a string naming the thing at point."
@@ -247,6 +250,8 @@ This needs more work, to handle headings with lots of spaces in them."
 	     lst))
    (substring pcomplete-stub 1)))
 
+(defvar org-drawers)
+
 (defun pcomplete/org-mode/drawer ()
   "Complete a drawer name."
   (let ((spc (save-excursion

lisp/org-src.el

@@ -686,6 +686,8 @@ the language, a switch telling if the content should be in a single line."
   (interactive)
   (org-src-in-org-buffer (save-buffer)))
 
+(declare-function org-babel-tangle "ob-tangle" (&optional only-this-block target-file lang))
+
 (defun org-src-tangle (arg)
   "Tangle the parent buffer."
   (interactive)

lisp/org.el

@@ -76,6 +76,7 @@
   (require 'gnus-sum))
 
 (require 'calendar)
+(require 'format-spec)
 
 ;; Emacs 22 calendar compatibility:  Make sure the new variables are available
 (when (fboundp 'defvaralias)
@@ -4930,6 +4931,8 @@ sure that we are at the beginning of the line.")
   "Matches an headline, putting stars and text into groups.
 Stars are put in group 1 and the trimmed body in group 2.")
 
+(defvar bidi-paragraph-direction)
+
 ;;;###autoload
 (define-derived-mode org-mode outline-mode "Org"
   "Outline-based notes management and organizer, alias
@@ -12854,7 +12857,7 @@ headlines matching this string."
 				   (buffer-name (buffer-base-buffer)))))))
 	 (case-fold-search nil)
 	 (org-map-continue-from nil)
-         lspos tags
+         lspos tags tags-list
 	 (tags-alist (list (cons 0 org-file-tags)))
 	 (llast 0) rtn rtn1 level category i txt
 	 todo marker entry priority)
@@ -14985,6 +14988,7 @@ So these are more for recording a certain time/date."
 (defvar org-read-date-final-answer nil)
 (defvar org-read-date-analyze-futurep nil)
 (defvar org-read-date-analyze-forced-year nil)
+(defvar org-read-date-inactive)
 
 (defun org-read-date (&optional with-time to-time from-string prompt
 				default-time default-input inactive)
@@ -15184,7 +15188,6 @@ user."
 (defvar def)
 (defvar defdecode)
 (defvar with-time)
-(defvar org-read-date-inactive)
 (defun org-read-date-display ()
   "Display the current date prompt interpretation in the minibuffer."
   (when org-read-date-display-live
@@ -17007,6 +17010,8 @@ Some of the options can be changed using the variable
 	      (error "Unknown conversion type %s for latex fragments"
 		     processing-type)))))))))
 
+(declare-function format-spec "format-spec" (format specification))
+
 (defun org-create-math-formula (latex-frag &optional mathml-file)
   "Convert LATEX-FRAG to MathML and store it in MATHML-FILE.
 Use `org-latex-to-mathml-convert-command'.  If the conversion is