Drawable.ObjectDecalType not rendered

[charliefoxtwo]

The China horde logic is in for Generals, which normally has an accompanying image drawn underneath all affected units. this is set in Drawable.cs, and just needs to be, well... drawn.

OpenSAGE/src/OpenSage.Game/Client/Drawable.cs

Line 79 in 0366edc

public ObjectDecalType ObjectDecalType;

It appears similar to RadiusCursorDecals, only that class can only handle 512x512 images, and these decals are 128x128.

OpenSAGE/src/OpenSage.Game/Terrain/RadiusCursorDecals.cs

Lines 26 to 27 in 0366edc

	// TODO: Support non-512px texture sizes.
	private const uint TextureSize = 512;

Desired outcome: