Scripts/Quests: Fix Red Snapper - Very Tasty! GOb

Fix 'School of Red Snapper' now disappear correctly when using 'Draenei Fishing Net', the bug is caused because the GameObject is SpellFocus type.

Fix: #1673
Actually has a SpellRange Id 12 (5 yards), there is any less than this range?, I failed to see the values properly in the DBC :/