Leprechaun_Hat should be refineable (issue #2407)

Thanks @uddevil !

db/re/item_db.txt

@@ -9510,7 +9510,7 @@
 18562,Bone_Hat,Bone Hat,4,20,,200,,3,,1,0xFFFFFFFF,63,2,256,,10,1,732,{ bonus bMdef,3; },{},{}
 18563,Heart_Wing_Hairband,Heart Wing Hairband,4,20,,300,,0,,1,0xFFFFFFFF,63,2,256,,50,1,733,{ bonus bUseSPrate,-10; bonus bDelayrate,-5; .@r = getrefine()/3; if(.@r>0){ bonus bUseSPrate,.@r*3; bonus bDelayrate,.@r*3; } },{},{}
 18564,Love_Piece,Love Piece,4,20,,200,,0,,0,0xFFFFFFFF,63,2,1,,50,0,734,{ bonus bNoCastCancel,1; bonus bUseSPrate,15; },{},{}
-18565,Leprechaun_Hat,Leprechaun Hat,4,20,,300,,8,,1,0xFFFFFFFF,63,2,256,,40,0,735,{ bonus bStr,1; bonus bInt,1; bonus bMdef,4; if(getrefine()>6){ bonus2 bAddMonsterDropItem,12135,50; } },{},{}
+18565,Leprechaun_Hat,St Patrick's Hat,4,20,,300,,8,,1,0xFFFFFFFF,63,2,256,,40,1,735,{ bonus bStr,1; bonus bInt,1; bonus bMdef,4; if(getrefine()>6){ bonus2 bAddMonsterDropItem,12135,50; } },{},{}
 18566,Nut_Donut_In_Mouth,Nut Donut In Mouth,4,20,,0,,1,,0,0xFFFFFFFF,63,2,1,,0,0,736,{ bonus bBaseAtk,5; bonus bMatk,5; },{},{}
 18567,Stretched_Nose,Stretched Nose,4,20,,100,,0,,0,0xFFFFFFFF,63,2,1,,0,0,737,{},{},{}
 18568,Humming_Bird,Humming Bird,4,20,,100,,3,,0,0xFFFFFFFF,63,2,256,,10,0,702,{ bonus bMdef,6; },{},{}