Torque 3D Beta 3,4,5 Bug: crash on multiple terrains with different mat count

In case we have more than one terrain block in mission and first block using more textures comparing to others, we need to be sure HERE we are not trying to use NULL's properties, so checking if material is actually fixed crashing when loading mission. The proper fix should be "matCount" to equal the exact number of material on "current" terrain block being process, haven't looked into this though.

Inside:
bool TerrainCellMaterial::_createPass( Vector<MaterialInfo*> *materials, Pass *pass, bool firstPass ):
After this code block:

normalMaps.clear();
      pass->materials.clear();

      for ( U32 i=0; i < matCount; i++ )
      {
         TerrainMaterial *mat = (*materials)[i]->mat;

I needed to add this check:

...
      for ( U32 i=0; i < matCount && !baseOnly; i++ )
      {
         TerrainMaterial *mat = (*materials)[i]->mat;

         if ( mat == NULL )
            continue;

I'm doing some "research" with T3D (have 16 terrain blocks) and noticed with when was messing with painting and re-logging.