item: fix undefined zero-size array

src/input/item.c

@@ -772,22 +772,27 @@ void input_item_SetEpgOffline( input_item_t *p_item )
 #ifdef EPG_DEBUG
     vlc_mutex_lock( &p_item->lock );
     const int i_epg_info = p_item->i_epg;
-    char *ppsz_epg_info[i_epg_info];
-    for( int i = 0; i < p_item->i_epg; i++ )
+    if( i_epg_info > 0 )
     {
-        const vlc_epg_t *p_epg = p_item->pp_epg[i];
-        if( asprintf( &ppsz_epg_info[i], "EPG %s", p_epg->psz_name ? p_epg->psz_name : "unknown" ) < 0 )
-            ppsz_epg_info[i] = NULL;
-    }
-    vlc_mutex_unlock( &p_item->lock );
+        char *ppsz_epg_info[i_epg_info];
+        for( int i = 0; i < p_item->i_epg; i++ )
+        {
+            const vlc_epg_t *p_epg = p_item->pp_epg[i];
+            if( asprintf( &ppsz_epg_info[i], "EPG %s", p_epg->psz_name ? p_epg->psz_name : "unknown" ) < 0 )
+                ppsz_epg_info[i] = NULL;
+        }
+        vlc_mutex_unlock( &p_item->lock );
 
-    for( int i = 0; i < i_epg_info; i++ )
-    {
-        if( !ppsz_epg_info[i] )
-            continue;
-        input_item_DelInfo( p_item, ppsz_epg_info[i], NULL );
-        free( ppsz_epg_info[i] );
+        for( int i = 0; i < i_epg_info; i++ )
+        {
+            if( !ppsz_epg_info[i] )
+                continue;
+            input_item_DelInfo( p_item, ppsz_epg_info[i], NULL );
+            free( ppsz_epg_info[i] );
+        }
     }
+    else
+        vlc_mutex_unlock( &p_item->lock );
 #endif
 
     vlc_event_t event = { .type = vlc_InputItemInfoChanged, };