Draw Manager: Use engine type pointer instead of engine name.

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source/blender/draw/modes/edit_lattice_mode.c

@@ -83,7 +83,7 @@ typedef struct EDIT_LATTICE_Data {
 	/* Struct returned by DRW_viewport_engine_data_get.
 	 * If you don't use one of these, just make it a (void *) */
 	// void *fbl;
-	char engine_name[32]; /* Required */
+	void *engine_type; /* Required */
 	EDIT_LATTICE_FramebufferList *fbl;
 	EDIT_LATTICE_TextureList *txl;
 	EDIT_LATTICE_PassList *psl;