Sample level0 does not work on real HW

[ABelliqueux]

When trying to load level0 on real HW, black screen, but level1 works.

Could be :

• Dependency on a pointer that's not honored by the content of the level file (physics ?).
• Something to do with the temporary use of a hardcoded mesh in the LEVEL struc : Removed with 8469e7a

  3dcam-headers/custom_types.h

  Line 133 in 92d05f2

  MESH * meshPlan; // This one is temporary

[ABelliqueux]

Issue seems to be related to trying to load/use non existent texture data in vram.

Fixing was :

• Checking for actual texture data before trying to load a texture to vram.
• Setting TPage to (2,0,0,0) if no data exists.
• Setting UVs to 0 if no data exists

Now works in emu, real hw test needed to close.

[ABelliqueux]

Works on real HW with xstation, still not working via serial upload...