#2 getSimilarProducts method was using wrong member variable

[brian]

getSimilarProducts was referencing 'this->m_similar' yet the
variable name it wanted (as far as I can tell) is this-
>m_similarProducts

this patch simply changes the references from m_similar to
m_similarProducts within the getSimilarProducts method.

[brian]

patch heavyDetails getSimilarProducts method to use appropriate member variable.