Merge pull request #9008 from Popov72/master

Fix callback of FilesInput sometimes not called

src/Misc/filesInput.ts

@@ -157,7 +157,7 @@ export class FilesInput {
                 }
             }
 
-            if (--remaining.count) {
+            if (--remaining.count === 0) {
                 callback();
             }
         });