[libpeas] Add various checks to PeasObjectModule functions

[Garrett Regier <gregier src gnome org>]

commit 57d82ee7f8aff6c743d41bda778531111215f54d
Author: Garrett Regier <garrettregier gmail com>
Date:   Fri Nov 20 03:11:03 2015 -0800

    Add various checks to PeasObjectModule functions

 libpeas/peas-object-module.c |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)
---
diff --git a/libpeas/peas-object-module.c b/libpeas/peas-object-module.c
index ec9fa17..2c4a2f1 100644
--- a/libpeas/peas-object-module.c
+++ b/libpeas/peas-object-module.c
@@ -336,6 +336,9 @@ peas_object_module_new (const gchar *module_name,
                         const gchar *path,
                         gboolean     resident)
 {
+  g_return_val_if_fail (module_name != NULL && *module_name != '\0', NULL);
+  g_return_val_if_fail (path != NULL && *path != '\0', NULL);
+
   return PEAS_OBJECT_MODULE (g_object_new (PEAS_TYPE_OBJECT_MODULE,
                                            "module-name", module_name,
                                            "path", path,
@@ -362,6 +365,9 @@ peas_object_module_new_full (const gchar *module_name,
                              gboolean     resident,
                              gboolean     local_linkage)
 {
+  g_return_val_if_fail (module_name != NULL && *module_name != '\0', NULL);
+  g_return_val_if_fail (path != NULL && *path != '\0', NULL);
+
   return PEAS_OBJECT_MODULE (g_object_new (PEAS_TYPE_OBJECT_MODULE,
                                            "module-name", module_name,
                                            "path", path,
@@ -396,6 +402,9 @@ peas_object_module_create_object (PeasObjectModule *module,
 
   g_return_val_if_fail (PEAS_IS_OBJECT_MODULE (module), NULL);
 
+  if (interface != PEAS_TYPE_PLUGIN_LOADER)
+    g_return_val_if_fail (G_TYPE_IS_INTERFACE (interface), NULL);
+
   impls = (InterfaceImplementation *) priv->implementations->data;
   for (i = 0; i < priv->implementations->len; ++i)
     if (impls[i].iface_type == interface)
@@ -423,6 +432,9 @@ peas_object_module_provides_object (PeasObjectModule *module,
 
   g_return_val_if_fail (PEAS_IS_OBJECT_MODULE (module), FALSE);
 
+  if (interface != PEAS_TYPE_PLUGIN_LOADER)
+    g_return_val_if_fail (G_TYPE_IS_INTERFACE (interface), FALSE);
+
   impls = (InterfaceImplementation *) priv->implementations->data;
   for (i = 0; i < priv->implementations->len; ++i)
     if (impls[i].iface_type == interface)