[gcalctool/vala] Use Posix defines for return codes

[Robert Ancell <rancell src gnome org>]

commit baca048040549c5e5fb1ddb50538252e47c399fa
Author: Robert Ancell <robert ancell canonical com>
Date:   Sat Oct 13 21:10:13 2012 +1300

    Use Posix defines for return codes

 src/gcalctool.vala |   16 ++++++++--------
 1 files changed, 8 insertions(+), 8 deletions(-)
---
diff --git a/src/gcalctool.vala b/src/gcalctool.vala
index 65f66f5..3f5924a 100644
--- a/src/gcalctool.vala
+++ b/src/gcalctool.vala
@@ -147,12 +147,12 @@ public class GCalctool : Gtk.Application
         else if (error == ErrorCode.MP)
         {
             stderr.printf ("Error: %s\n", mp_get_error ());
-            Posix.exit (1);
+            Posix.exit (Posix.EXIT_FAILURE);
         }
         else
         {
             stderr.printf ("Error: %s\n", mp_error_code_to_string (error));
-            Posix.exit (1);
+            Posix.exit (Posix.EXIT_FAILURE);
         }
     }
 
@@ -194,22 +194,22 @@ public class GCalctool : Gtk.Application
             {
                 /* NOTE: Is not translated so can be easily parsed */
                 stderr.printf ("%1$s %2$s\n", progname, VERSION);
-                Posix.exit (0);
+                Posix.exit (Posix.EXIT_SUCCESS);
             }
             else if (arg == "-h" || arg == "-?" || arg == "--help")
             {
                 usage (progname, true, false);
-                Posix.exit (0);
+                Posix.exit (Posix.EXIT_SUCCESS);
             }
             else if (arg == "--help-all")
             {
                 usage (progname, true, true);
-                Posix.exit (0);
+                Posix.exit (Posix.EXIT_SUCCESS);
             }
             else if (arg == "--help-gtk")
             {
                 usage (progname, false, true);
-                Posix.exit (0);
+                Posix.exit (Posix.EXIT_SUCCESS);
             }
             else if (arg == "-s" || arg == "--solve")
             {
@@ -219,7 +219,7 @@ public class GCalctool : Gtk.Application
                     stderr.printf (/* Error printed to stderr when user uses --solve argument without an equation */
                                    _("Argument --solve requires an equation to solve"));
                     stderr.printf ("\n");
-                    Posix.exit (1);
+                    Posix.exit (Posix.EXIT_FAILURE);
                 }
                 else
                     solve (args[i]);
@@ -230,7 +230,7 @@ public class GCalctool : Gtk.Application
                                _("Unknown argument '%s'"), arg);
                 stderr.printf ("\n");
                 usage (progname, true, false);
-                Posix.exit (1);
+                Posix.exit (Posix.EXIT_FAILURE);
             }
         }
     }