#1417 protect realloc

[Martin Strunz]

/src/plugins/contrib/wxContribItems/wxthings/src/matrix2d.cpp lines 899 and 939
Code:
if ( num_points > sizeof_data - num_cols2 )
{
data = (double)realloc( data, sizeof_data+1000 ); // <- may be better use data2
}

[Miguel Gimenez]

The whole code is a mess, and the first call to realloc is highly suspicious (Why 1000? What about sizeof(double)?)

I would not bother fixing this.