QmakeProjectManager: Fix access to deleted object

Amends c7d8b9b01c.

Fixes: QTCREATORBUG-23576
Change-Id: I7de6679f3dd5ba950561d560195e5af5bfaf90a5
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/qmakeprojectmanager/qmakeparsernodes.cpp

@@ -1205,9 +1205,9 @@ QmakeProFile::~QmakeProFile()
     qDeleteAll(m_extraCompilers);
     m_parseFutureWatcher->cancel();
     m_parseFutureWatcher->waitForFinished();
-    delete m_parseFutureWatcher;
     if (m_readerExact)
         applyAsyncEvaluate();
+    delete m_parseFutureWatcher;
 
     cleanupProFileReaders();
 }