property-ref on a component's property causes "wrong number of columns" error

[rbriguetto]

In the example #1234, if I add a new property to bar dynamic-component, a "property mapping has wrong number of columns" error is thrown.

<class name="foo">
    <id type="int" name="Id">
      <column name="Id"/>
      <generator class="native"/>
    </id>

    <dynamic-component name="MyProps">
      <many-to-one name="DynPointer" class="bar" property-ref="MyProps.DynValString2"/>
    </dynamic-component>
  </class>

  <class name="bar">
    <id type="int" name="Id">
      <column name="Id"/>
      <generator class="native"/>
    </id>
    <dynamic-component name="MyProps">
      <property name="DynValString2" type="string" unique="1"/>
      <property name="AnotherProperty" type="string" />
    </dynamic-component>
  </class>

[fredericDelaporte]

This occurs with regular components too.
The validity checking mechanism uses a bad function call for resolving the the property-ref targeted type, causing it to yield the component type instead of the component's property type.