* Logic for handling plant growth has been centralized into cBlockPlant, and all growable plants now inherit from it.

* Blocks now have an effect upon plant growth, just like in vanilla.

src/Blocks/BlockHandler.h

@@ -88,6 +88,9 @@ public:
 	
 	/** Checks if the block can stay at the specified relative coords in the chunk */
 	virtual bool CanBeAt(cChunkInterface & a_ChunkInterface, int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk);
+
+	/** Checks whether the block has an effect on growing the plant */
+	virtual bool CanSustainPlant(BLOCKTYPE a_Plant) { return false; }
 	
 	/** Checks if the block can be placed at this point.
 	Default: CanBeAt(...)