[gobject-introspection] tests: Fix declarations

[Philip Chimento <pchimento src gnome org>]

commit 7e9c478104fd5e864bbcbcaa54634e8251588884
Author: Philip Chimento <philip endlessm com>
Date:   Sun Mar 11 22:39:57 2018 -0700

    tests: Fix declarations
    
    Otherwise these will warn.

 tests/scanner/regress.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)
---
diff --git a/tests/scanner/regress.c b/tests/scanner/regress.c
index c9e39378..a940a199 100644
--- a/tests/scanner/regress.c
+++ b/tests/scanner/regress.c
@@ -3167,7 +3167,7 @@ regress_test_sub_obj_init (RegressTestSubObj *obj)
 }
 
 RegressTestObj*
-regress_test_sub_obj_new ()
+regress_test_sub_obj_new (void)
 {
   return g_object_new (REGRESS_TEST_TYPE_SUB_OBJ, NULL);
 }
@@ -3482,6 +3482,8 @@ regress_test_fundamental_sub_object_new (const char * data)
 #define regress_test_fundamental_hidden_sub_object_get_type \
   _regress_test_fundamental_hidden_sub_object_get_type
 
+GType regress_test_fundamental_hidden_sub_object_get_type (void);
+
 typedef struct _RegressTestFundamentalHiddenSubObject RegressTestFundamentalHiddenSubObject;
 typedef struct _GObjectClass                   RegressTestFundamentalHiddenSubObjectClass;
 struct _RegressTestFundamentalHiddenSubObject {
@@ -3887,15 +3889,14 @@ regress_test_skip_unannotated_callback (RegressTestCallback callback)
 
 /* interface */
 
+typedef RegressTestInterfaceIface RegressTestInterfaceInterface;
+G_DEFINE_INTERFACE (RegressTestInterface, regress_test_interface, G_TYPE_OBJECT)
+
 static void
 regress_test_interface_default_init(RegressTestInterfaceIface *iface)
 {
 }
 
-typedef RegressTestInterfaceIface RegressTestInterfaceInterface;
-G_DEFINE_INTERFACE (RegressTestInterface, regress_test_interface, G_TYPE_OBJECT)
-
-
 /* gobject with non-standard prefix */
 G_DEFINE_TYPE(RegressTestWi8021x, regress_test_wi_802_1x, G_TYPE_OBJECT);