dsm: forward the vlc_interrupt_unregister() return value

(cherry picked from commit 26af61217b)
Signed-off-by: Thomas Guillem <thomas@gllm.fr>

modules/access/dsm/access.c

@@ -149,10 +149,10 @@ smb_session_interrupt_register( access_sys_t *sys )
     vlc_interrupt_register( smb_session_interrupt_callback, sys->p_session );
 }
 
-static inline void
+static inline int
 smb_session_interrupt_unregister( void )
 {
-    vlc_interrupt_unregister();
+    return vlc_interrupt_unregister();
 }
 
 static void
@@ -167,18 +167,37 @@ netbios_ns_interrupt_register( netbios_ns *ns )
     vlc_interrupt_register( netbios_ns_interrupt_callback, ns );
 }
 
-static inline void
+static inline int
 netbios_ns_interrupt_unregister( void )
 {
-    vlc_interrupt_unregister();
+    return vlc_interrupt_unregister();
 }
 
 #else
 
-#define smb_session_interrupt_register( sys ) do {} while (0)
-#define smb_session_interrupt_unregister() do {} while(0)
-#define netbios_ns_interrupt_register( ns ) do {} while (0)
-#define netbios_ns_interrupt_unregister() do {} while (0)
+static inline void
+smb_session_interrupt_register( access_sys_t *sys )
+{
+    (void) sys;
+}
+
+static inline int
+smb_session_interrupt_unregister( void )
+{
+    return 0;
+}
+
+static inline void
+netbios_ns_interrupt_register( netbios_ns *ns )
+{
+    (void) ns;
+}
+
+static inline int
+netbios_ns_interrupt_unregister( void )
+{
+    return 0;
+}
 
 #endif