Pick should not find petrified wood. Pick won't take damage in creative mode.

Overlooked that TFCBlocks.Ore2 with meta==6 should not be added to prospecting results while refactoring the code. Prospecting doesn't damage the tool while in creative mode anymore.
The pick will now properly prospect a 25 blocks cubed area, was only 11 in the positive coordinate direction

Thinking about it, if the indexers only iterate to less than 12 in the positive coordinate direction, the pick actually only prospects a 24³ blocks area instead of the intended 25³ blocks.
Merge pull request #332 from dmon82/Refactor

Fixed a condition I had overlooked, not excluding petrified wood from prospecting. ProPick now doesn't take damage in creative mode. Now prospects a 25 cubic blocks area instead of only 24.