Core/Spells: Fix priest talent "Improved Power Word: Shield"

sql/updates/world/2013_07_24_00_world_spell_misc_434.sql

@@ -0,0 +1,8 @@
+DELETE FROM `spell_script_names` WHERE `spell_id`=-14748;
+INSERT INTO `spell_script_names`(`spell_id`, `ScriptName`) VALUES
+(-14748,'spell_pri_improved_power_word_shield');
+
+DELETE FROM `spell_ranks` WHERE `first_spell_id`=14748;
+INSERT INTO `spell_ranks` (`first_spell_id`, `spell_id`, `rank`) VALUES
+(14748, 14748, 1),
+(14748, 14768, 2);