Fix typo in a comment.

src/ChangeLog

@@ -1,5 +1,7 @@
 2001-10-27  Pavel Jan,Bm(Bk  <Pavel@Janik.cz>
 
+	* xterm.c: Fix typo in a comment.
+
 	* emacs.c: Fix typos in comments.
 	Remove unnecessary spaces.
 	Change doc-string comments to `new style' [w/`doc:' keyword].

src/xterm.c

@@ -11074,7 +11074,7 @@ XTread_socket (sd, bufp, numchars, expected)
 /* Notice if the text cursor of window W has been overwritten by a
    drawing operation that outputs N glyphs starting at START_X and
    ending at END_X in the line given by output_cursor.vpos.
-   Coordinates are area-relative.  END_X < 0 means means all the rest
+   Coordinates are area-relative.  END_X < 0 means all the rest
    of the line after START_X has been written.  */
 
 static void