DB/Gossip: fix bad update in 2017_04_30_00_world_335.sql

* Properly remove text0_1 content from npc_text ID 16432

Ref. commit 88413de9d848dfd167779c0172d4683ce64b9497

Ref. issue #19527
(DB/Gossip: npc_text contains "MISSING TEXT" and missing info in 48 rows)

sql/updates/world/3.3.5/2017_04_30_02_world_335.sql

@@ -0,0 +1,2 @@
+-- Griniblix the Spectator - Dire Maul, Feralas (entry 14395)
+UPDATE `npc_text` SET `text0_1`= '' WHERE `ID`= 16432;