[glib/glib-2-40] platform_get_argv0: drop unneeded headers for OpenBSD

[Ryan Lortie <desrt src gnome org>]

commit 2e1f170096869926fab544d5aec31094597a82b3
Author: Antoine Jacoutot <ajacoutot gnome org>
Date:   Wed Apr 16 10:27:09 2014 +0200

    platform_get_argv0: drop unneeded headers for OpenBSD
    
    And properly set the size of len.
    There is also no need for realloc(), g_malloc0 will do just fine.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=728280

 glib/goption.c |   11 ++++++-----
 1 files changed, 6 insertions(+), 5 deletions(-)
---
diff --git a/glib/goption.c b/glib/goption.c
index 31bbf16..a11971f 100644
--- a/glib/goption.c
+++ b/glib/goption.c
@@ -185,9 +185,7 @@
 #include <errno.h>
 
 #if defined __OpenBSD__
-#include <sys/types.h>
 #include <unistd.h>
-#include <sys/param.h>
 #include <sys/sysctl.h>
 #endif
 
@@ -1763,13 +1761,16 @@ platform_get_argv0 (void)
   g_free (cmdline);
   return base_arg0;
 #elif defined __OpenBSD__
-  char **cmdline = NULL;
+  char **cmdline;
   char *base_arg0;
-  gsize len = PATH_MAX;
+  gsize len;
 
   int mib[] = { CTL_KERN, KERN_PROC_ARGS, getpid(), KERN_PROC_ARGV };
 
-  cmdline = (char **) realloc (cmdline, len);
+  if (sysctl (mib, G_N_ELEMENTS (mib), NULL, &len, NULL, 0) == -1)
+      return NULL;
+
+  cmdline = g_malloc0 (len);
 
   if (sysctl (mib, G_N_ELEMENTS (mib), cmdline, &len, NULL, 0) == -1)
     {