(lyskom-read-options-eval): Use equal instead of = so that this

doesn't fail on user-areas who don't have the "elisp" and/or "common"
part.

src/flags.el

@@ -328,7 +328,9 @@ If successful then set the buffer not-modified. Else print a warning."
 	(while (> (length lyskom-options-text) 2)
 	  (setq working (lyskom-read-options-eval-get-holerith))
 	  (cond
-	   ((= r common-no)
+	   ;; Note that common-no may be nil here, so the comparison
+	   ;; cannot be performed with '=.
+	   ((equal r common-no)
 	    (let ((lyskom-options-text working)
 		  name gname value)
 	      (while (> (length lyskom-options-text) 2)
@@ -346,7 +348,9 @@ If successful then set the buffer not-modified. Else print a warning."
 		    (setq lyskom-global-non-boolean-variables
 			  (cons name lyskom-global-non-boolean-variables))))
 		(lyskom-set-var-from-string name value))))
-	   ((= r elisp-no)
+	   ;; Note that elisp-no may be nil here, so the comparison
+	   ;; cannot be performed with '=.
+	   ((equal r elisp-no)
 	    (let ((lyskom-options-text working)
 		  name value)
 	      (while (> (length lyskom-options-text) 2)