Sheep fixes.

Now amount of wool you get when shearing a sheep is random.
Sheeps only spawn in white color (I will add sheep dying soon).
Extra line
Use STR_Warrior code and changed variable name
Fixed compilation

STR_Warrior code had an error (I copied&pasted it before)
Merge pull request #294 from tonibm19/patch-3

Correct wool drops when shearing a sheep.