SilverSearcher: Fix quitting the loop after resume

Quit the loop after resuming when the process already finished.

Amends cd70d10dce

Change-Id: I73d4b11bb2be47ce9cc6c6c816b60058bc2db250
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>

src/plugins/silversearcher/findinfilessilversearcher.cpp

@@ -162,6 +162,8 @@ static void runSilverSeacher(QPromise<SearchResultItems> &promise,
             SilverSearcher::parse(promise, output, &parserState, regExp);
         }
         outputBuffer.clear();
+        if (process.state() == QProcess::NotRunning)
+            loop.quit();
     });
     watcher.setFuture(future);
     loop.exec(QEventLoop::ExcludeUserInputEvents);