Utils: Don't crash on empty 'find' output

Change-Id: I772718d882ac7744c4f955190b038cd1e78f347d
Reviewed-by: hjk <hjk@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Marcus Tillmanns <marcus.tillmanns@qt.io>

src/libs/utils/fileutils.cpp

@@ -711,6 +711,9 @@ static bool iterateWithFindHelper(
     }
 
     QStringList entries = out.split("\n", Qt::SkipEmptyParts);
+    if (entries.isEmpty())
+        return true;
+
     // Remove the first line, it is always the directory we are searching in.
     // as long as we do not specify "mindepth > 0"
     entries.pop_front();