* bytecomp.el (byte-compile-report-error): Allow the argument to be a string.

Due to the vague doc, it was already being used this way.

lisp/ChangeLog

+2014-11-08  Glenn Morris  <rgm@gnu.org>
+
+	* emacs-lisp/bytecomp.el (byte-compile-report-error):
+	Allow the argument to be a string.  Due to the vague doc,
+	it was already being used this way.
+
 2014-11-07  Michael Albinus  <michael.albinus@gmx.de>
 	* net/tramp.el (tramp-check-cached-permissions): Include hop in

lisp/emacs-lisp/bytecomp.el

@@ -1147,10 +1147,13 @@ Each function's symbol gets added to `byte-compile-noruntime-functions'."
 	(byte-compile-warn "%s" msg)))))
 
 (defun byte-compile-report-error (error-info)
-  "Report Lisp error in compilation.  ERROR-INFO is the error data."
+  "Report Lisp error in compilation.
+ERROR-INFO is the error data, in the form of either (ERROR-SYMBOL . DATA)
+or STRING."
   (setq byte-compiler-error-flag t)
   (byte-compile-log-warning
-   (error-message-string error-info)
+   (if (stringp error-info) error-info
+     (error-message-string error-info))
    nil :error))
 
 ;;; sanity-checking arglists