Fix crash when some random people got slimesaplings with metadata. Y …

…u do dis, people.

src/main/java/tconstruct/blocks/slime/SlimeSapling.java

@@ -72,7 +72,7 @@ public void updateTick (World world, int x, int y, int z, Random random)
     @SideOnly(Side.CLIENT)
     public IIcon getIcon (int side, int meta)
     {
-        return icons[meta % 8];
+        return icons[meta % icons.length];
     }
 
     @Override