[gnome-builder/wip/chergert/pipeline: 9/48] subprocess: special case NULL args

[Christian Hergert <chergert src gnome org>]

commit c5ebe4332d5a4b276ca3d211d17f6292144bf1ac
Author: Christian Hergert <chergert redhat com>
Date:   Fri Feb 3 12:17:00 2017 -0800

    subprocess: special case NULL args
    
    This can be convenient in a few cases to remove extra NULL checks in
    caller code.

 libide/subprocess/ide-subprocess-launcher.c |   16 ++++++++++++----
 1 files changed, 12 insertions(+), 4 deletions(-)
---
diff --git a/libide/subprocess/ide-subprocess-launcher.c b/libide/subprocess/ide-subprocess-launcher.c
index 6e4a0e9..c39c7ca 100644
--- a/libide/subprocess/ide-subprocess-launcher.c
+++ b/libide/subprocess/ide-subprocess-launcher.c
@@ -659,17 +659,25 @@ ide_subprocess_launcher_overlay_environment (IdeSubprocessLauncher *self,
 
 /**
  * ide_subprocess_launcher_push_args:
- * @args: (array zero-terminated=1) (element-type utf8): the arguments
+ * @self: A #IdeSubprocessLauncher
+ * @args: (array zero-terminated=1) (element-type utf8) (nullable): the arguments
+ *
+ * This function is semantically identical to calling ide_subprocess_launcher_push_argv()
+ * for each element of @args.
+ *
+ * If @args is %NULL, this function does nothing.
  */
 void
 ide_subprocess_launcher_push_args (IdeSubprocessLauncher *self,
                                    const gchar * const   *args)
 {
   g_return_if_fail (IDE_IS_SUBPROCESS_LAUNCHER (self));
-  g_return_if_fail (args != NULL);
 
-  for (guint i = 0; args [i] != NULL; i++)
-    ide_subprocess_launcher_push_argv (self, args [i]);
+  if (args != NULL)
+    {
+      for (guint i = 0; args [i] != NULL; i++)
+        ide_subprocess_launcher_push_argv (self, args [i]);
+    }
 }
 
 gchar *