Ticket #82 (savannah: "save as" retains mode) patch by imdagger

Consider following scenario:
$ touch /tmp/foo_file
$ chmod 0444 /tmp/foo_file # readonly for owner
$ mcedit /tmp/foo_file
> 1. edit
> 2. try to save, fail. choose another name: /tmp/foo_file2
> 3. edit
> 4. try to save, fail again!

This patch adds owner write permissions for files, created in
step 2.

Signed-off-by: Sergei Trofimovich <slyfox@inbox.ru>

edit/editcmd.c

@@ -497,6 +497,15 @@ edit_save_as_cmd (WEdit *edit)
 		    save_lock = edit_lock_file (exp);
 	    }
 
+	    if (different_filename)
+	    {
+		/*
+		 * Allow user to write into saved (under another name) file
+		 * even if original file had r/o user permissions.
+		 */
+		edit->stat1.st_mode |= S_IWRITE;
+	    }
+
 	    rv = edit_save_file (edit, exp);
 	    switch (rv) {
 	    case 1: