SimpleTextViewer example: Fix documentation not showing

Add a path search including the application source directory, which
should at least fix Qt 5.15. For educational purposes, also uses
some standard paths.

Pick-to: 5.15
Change-Id: I1b20bd632b604a1413d7ac66d2e419e771708562
Reviewed-by: Kai Koehne <kai.koehne@qt.io>

1 files changed, 1 insertions, 0 deletions

diff --git a/examples/assistant/simpletextviewer/assistant.h b/examples/assistant/simpletextviewer/assistant.h
index 1ea7dd78f..c9b8f382c 100644
--- a/examples/assistant/simpletextviewer/assistant.h
+++ b/examples/assistant/simpletextviewer/assistant.h
@@ -69,6 +69,7 @@ public:
 
 private:
     bool startAssistant();
+    void showError(const QString &message);
     QProcess *proc;
 };