Multiple fixes to figuring out inventory gift subid

Figure out subid for guest passes too
Fix precise subid not working in inventory
Do not try to use non existing cache value

scripts/community/inventory.js

@@ -449,12 +449,12 @@
 						foundState = FoundState.Added;
 					}
 				}
-				else if( hasPreciseSubIDsEnabled && item.description.owner_actions && item.description.type === 'Gift' )
+				else if( hasPreciseSubIDsEnabled && item.description.owner_actions && ( item.description.type === 'Gift' || item.description.type === 'Guest Pass' ) )
 				{
 					// If a gift has no actions, rgActions is undefined
 					if( !rgActions )
 					{
-						rgActions = [];
+						arguments[ 2 ] = item.description.actions = rgActions = [];
 					}
 
 					for( let i = 0; i < rgActions.length; i++ )
@@ -463,13 +463,20 @@
 
 						if( link.steamdb )
 						{
-							if( link.link.match( /^#steamdb_/ ) !== null )
+							foundState = FoundState.Added;
+
+							if( link.link.startsWith( '#steamdb_' ) )
 							{
-								rgActions[ i ].link = homepage + 'sub/' + giftCache[ item.description.classid ] + '/';
+								if( giftCache[ item.description.classid ] )
+								{
+									rgActions[ i ].link = homepage + 'sub/' + giftCache[ item.description.classid ] + '/';
+								}
+								else
+								{
+									foundState = FoundState.DisableButtons;
+								}
 							}
 
-							foundState = FoundState.Added;
-
 							break;
 						}
 					}