[fixQCustomPlot] QCustomPlot: Fix commented sections to avoid compiler warnings (Minor change)

Merging branch 'fixQCustomPlot'  into 'main'.

See merge request !1116

3rdparty/GUI/qcustomplot/qcustomplot.cpp

@@ -32088,8 +32088,11 @@ QCPPolarAxisRadial::SelectablePart QCPPolarAxisRadial::getPartAt(const QPointF &
     return spTickLabels;
   else if (mAxisPainter->labelSelectionBox().contains(pos.toPoint()))
     return spAxisLabel;
-  else */
+  else
     return spNone;
+  */
+
+  return spNone;
 }
 /* inherits documentation from base class */
@@ -32908,8 +32911,11 @@ QCPPolarAxisAngular::SelectablePart QCPPolarAxisAngular::getPartAt(const QPointF
     return spTickLabels;
   else if (mAxisPainter->labelSelectionBox().contains(pos.toPoint()))
     return spAxisLabel;
-  else */
+  else
     return spNone;
+  */
+
+  return spNone;
 }
 /* inherits documentation from base class */