Miscellaneous code cleaning

- add <stdarg.h> or <varargs.h> in snprintf.h
  and remove those inclusions in the other #ifdef NEED_SNPRINTF_H codes

- remove the check of multiple inclusions in source (.c)  code
  (there is a bit loss of _cpp_ performance, but I prefer the gain of
   code reading and maintenance; and nowadays, disk caches and VM are
   correctly optimized ;-).

- protect all (well almost) header files against multiple inclusions

- add header (i.e. GPL license) in some include files

- reorganize a bit the way header files are included:

  First:
  #include <system_include_files>
  #include <external_package_include_files (e.g. gtk, glib etc.)>
  Then
  #include "ethereal_include_files"

  with the correct HAVE_XXX or NEED_XXX protections.

- add some HAVE_XXX checks before including some system header files

- add the same HAVE_XXX in wiretap as in ethereal

Please forgive me, if I break something (I've only compiled and regression
tested on Linux).

svn path=/trunk/; revision=2254

1 files changed, 4 insertions, 6 deletions

diff --git a/gtk/help_dlg.c b/gtk/help_dlg.c
index 8da3038129..c85ed2408c 100644
--- a/gtk/help_dlg.c
+++ b/gtk/help_dlg.c
@@ -1,6 +1,6 @@
 /* help_dlg.c
  *
- * $Id: help_dlg.c,v 1.1 2000/08/08 12:28:50 deniel Exp $
+ * $Id: help_dlg.c,v 1.2 2000/08/11 13:33:11 deniel Exp $
  *
  * Laurent Deniel <deniel@worldnet.fr>
  *
@@ -32,14 +32,12 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
+
+#ifdef HAVE_SYS_TYPES_H
 #include <sys/types.h>
+#endif
 
 #ifdef NEED_SNPRINTF_H
-# ifdef HAVE_STDARG_H
-#  include <stdarg.h>
-# else
-#  include <varargs.h>
-# endif
 # include "snprintf.h"
 #endif