org-image--align: Fix image alignment when image is not inside paragraph

* lisp/org.el (org-image--align): Improve docstring.  Do not try to
align when image is not inside a paragraph.

Reported-by: Lin Sun <sunlin7.mail@gmail.com>
Link: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=71484

lisp/org.el

@@ -16981,10 +16981,11 @@ buffer boundaries with possible narrowing."
      (t nil))))
 
 (defun org-image--align (link)
-  "Determine the alignment of the image link.
+  "Determine the alignment of the image LINK.
+LINK is a link object.
 
 In decreasing order of priority, this is controlled:
-- Per image by the value of `:center' or ``:align' in the
+- Per image by the value of `:center' or `:align' in the
 affiliated keyword `#+attr_org'.
 - By the `#+attr_html' or `#+attr_latex` keywords with valid
   `:center' or `:align' values.
@@ -16998,15 +16999,16 @@ will cause it to be right-aligned.  A value of \"left\" or nil
 implies no special alignment."
   (let ((par (org-element-lineage link 'paragraph)))
     ;; Only align when image is not surrounded by paragraph text:
-    (when (and (= (org-element-begin link)
+    (when (and par ; when image is not in paragraph, but in table/headline/etc, do not align
+               (= (org-element-begin link)
                   (save-excursion
                     (goto-char (org-element-contents-begin par))
                     (skip-chars-forward "\t ")
                     (point)))           ;account for leading space
                                         ;before link
                (<= (- (org-element-contents-end par)
-                      (org-element-end link))
-                   1))                  ;account for trailing newline
+                     (org-element-end link))
+                  1))                  ;account for trailing newline
                                         ;at end of paragraph
       (save-match-data
         ;; Look for a valid ":center t" or ":align left|center|right"