EDA_SHAPE_DESC(): catch a std::runtime_error when emitted by

template<typename T> T Get( PROPERTY_BASE* aProperty ) to avoid a crash,
and displays in Debug mode the runtime error message.
Fixes #14347
https://gitlab.com/kicad/code/kicad/issues/14347

common/eda_shape.cpp

@@ -1736,7 +1736,17 @@ static struct EDA_SHAPE_DESC
         filled->SetAvailableFunc(
                       [=]( INSPECTABLE* aItem ) -> bool
                       {
-                          SHAPE_T itemShape = aItem->Get<SHAPE_T>( shape );
+                          SHAPE_T itemShape;
+
+                          try
+                          {
+                            itemShape = aItem->Get<SHAPE_T>( shape );
+                          }
+                          catch( std::runtime_error& err )
+                          {
+                              wxFAIL_MSG( err.what() );
+                              return false;
+                          }
 
                           switch( itemShape )
                           {