shoutcast: fix NULL deref on error

(cherry picked from commit ad22a4a41fa28a2e6bb90f9ec4d72b6c10e58926)

modules/demux/playlist/shoutcast.c

@@ -314,11 +314,18 @@ static int DemuxStation( demux_t *p_demux, xml_reader_t *p_xml_reader,
                     }
 
                     /* Create the item */
-                    input_item_t *p_input;
+                    input_item_t *p_input = NULL;
+
+                    if( likely(psz_mrl != NULL) )
+                    {
                         resolve_xml_special_chars( psz_mrl );
                         p_input = input_item_New( psz_mrl, psz_name );
-                    input_item_CopyOptions( p_input_node->p_item, p_input );
                         free( psz_mrl );
+                    }
+
+                    if( likely(p_input != NULL) )
+                    {
+                        input_item_CopyOptions( p_input_node->p_item, p_input );
 
 #define SADD_INFO( type, field ) \
                     if( field ) \
@@ -336,6 +343,7 @@ static int DemuxStation( demux_t *p_demux, xml_reader_t *p_xml_reader,
                             input_item_SetRating( p_input, psz_rt );
                         input_item_node_AppendItem( p_input_node, p_input );
                         vlc_gc_decref( p_input );
+                    }
                     FREENULL( psz_base );
                     FREENULL( psz_name );
                     FREENULL( psz_mt );