Rectangle painting has changed since Qt 1.0

Doc says "a stroked rectangle has a size of rectangle.size()
plus the pen width".

t14/cannon.cpp

@@ -184,7 +184,7 @@ void CannonField::paintTarget( QPainter *p )
 {
     p->setBrush( Qt::red );
     p->setPen( Qt::black );
-    p->drawRect( targetRect() );
+    p->drawRect( targetRect().adjusted(0, 0, -1, -1) );
 }
 
 void CannonField::paintBarrier( QPainter *p )