Terminal: Coverity warning fixes

Change-Id: If96291ff6df97f7e85840eb0951cc3f4abfab0f6
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/terminal/terminalpane.cpp

@@ -162,7 +162,7 @@ void TerminalPane::setFocus()
 bool TerminalPane::hasFocus() const
 {
     if (const auto t = currentTerminal())
-        t->hasFocus();
+        return t->hasFocus();
 
     return false;
 }