Docker: Fix crash during directory iteration

Task-number: QTCREATORBUG-30790
Change-Id: Id59aa00f2ba8c960dd70d982e2d46a0bcf5bc0da
Reviewed-by: hjk <hjk@qt.io>

src/libs/gocmdbridge/client/bridgedfileaccess.cpp

@@ -653,7 +653,7 @@ void FileAccess::iterateDirectory(const FilePath &filePath,
     t.start();
 
     while (!result->isFinished()) {
-        if (result->isValid()) {
+        if (result->isValid() && idx < result->resultCount()) {
             result->resultAt(idx);
             // Wait for the next result to become available
             processResults();