* edit.c (check_file_access) [MIDNIGHT,GTK]: error message localized;
some cosmetics changes to avoid annoying warnings
* editcmd.c (edit_save_file): pclose returns 0 on success,
file fclose()d when fwrite fails
(pipe_mail): malloc () + sprintf () replaced by g_strdup_printf ()
* syntax.c (syntax_text): Makefile replaced by [Mm]akefile to cover
makefile and GNUmakefile
(upgrade_syntax_file): infinitive loop fixed when rule file
is outdated but it cannot be unlinked/overwritten
