QMakeProjectManager: Introduce member initialization.

Change-Id: I69df0c22a215b2df12f63fdc47082e9797fc02ac
Reviewed-by: Daniel Teske <daniel.teske@theqtcompany.com>

src/plugins/qmakeprojectmanager/profilehoverhandler.h

@@ -66,7 +66,7 @@ private:
                        const QString &keyword);
 
     QString m_docFragment;
-    ManualKind m_manualKind;
+    ManualKind m_manualKind = UnknownManual;
     const TextEditor::Keywords m_keywords;
 };