src: Fix an unused var warning plus an invalid conversion warning in libvlc-common.c.

include/main.h

@@ -49,7 +49,7 @@ struct libvlc_int_t
 
     vlc_object_t          *p_interaction;    ///< interface interaction object
 
-    vlc_object_t          *p_vlm;            ///< vlm if created from libvlc-common.
+    vlm_t                 *p_vlm;            ///< vlm if created from libvlc-common.
                                              /// (this is clearly private and
                                              //  shouldn't be used)
 

src/libvlc-common.c

@@ -1026,8 +1026,6 @@ int libvlc_InternalCleanup( libvlc_int_t *p_libvlc )
  */
 int libvlc_InternalDestroy( libvlc_int_t *p_libvlc, vlc_bool_t b_release )
 {
-    vlc_value_t lockval;
-
     if( !p_libvlc )
         return VLC_EGENERIC;