*Add error checks at spell_required table loading

*Allow spell_required table to store more than 1 spell learn requirement for a spell
*spell_required table data is removed from world.sql and since this commit the data for it should be maintained by db project you're using.

--HG--
branch : trunk

1 files changed, 3 insertions, 0 deletions

diff --git a/sql/updates/7261_world_spell_required.sql b/sql/updates/7261_world_spell_required.sql
new file mode 100644
index 00000000000..820a95adca5
--- /dev/null
+++ b/sql/updates/7261_world_spell_required.sql
@@ -0,0 +1,3 @@
+ALTER TABLE spell_required
+DROP PRIMARY KEY,
+ADD PRIMARY KEY (`spell_id`, `req_spell`);