Frost Nova AoE (fixes #1619)

- Increased Frost Nova AoE from 5x5 to 7x7
- Frost Nova no longer hits enemies that are on the same cell as the caster

db/pre-re/skill_db.txt

@@ -184,7 +184,7 @@
 85,9,8,2,4,0,0,10,-10,yes,0,0x2000,0,magic,0,0x0,		WZ_VERMILION,Lord of Vermilion
 86,9,8,1,1,0,0,5,1,yes,0,0x2000,0,magic,0,0x0,		WZ_WATERBALL,Water Ball
 87,9,6,2,1,0x1,0,10,1,yes,0,0,0,magic,0,0x0,		WZ_ICEWALL,Ice Wall
-88,0,6,4,1,0x2,2,10,1,yes,0,0x2000,0,magic,0,0x0,		WZ_FROSTNOVA,Frost Nova
+88,0,6,4,1,0x2,3,10,1,yes,0,0x2000,0,magic,0,0x0,		WZ_FROSTNOVA,Frost Nova
 89,9,6,2,1,0,0,10,1,yes,0,0x2000,0,magic,2,0x0,		WZ_STORMGUST,Storm Gust
 90,9,8,1,2,0,0,5,1:2:3:4:5,yes,0,0x2000,0,magic,0,0x0,	WZ_EARTHSPIKE,Earth Spike
 91,9,8,2,2,0,0,5,1:2:3:4:5,yes,0,0x2000,0,magic,0,0x10000,	WZ_HEAVENDRIVE,Heaven's Drive

db/re/skill_db.txt

@@ -184,7 +184,7 @@
 85,9,8,2,4,0,0,10,-10,yes,0,0x2000,0,magic,0,0x0,		WZ_VERMILION,Lord of Vermilion
 86,9,8,1,1,0,0,5,1,yes,0,0x2000,0,magic,0,0x0,		WZ_WATERBALL,Water Ball
 87,9,6,2,1,0x1,0,10,1,yes,0,0,0,magic,0,0x0,		WZ_ICEWALL,Ice Wall
-88,0,6,4,1,0x2,2,10,1,yes,0,0x2000,0,magic,0,0x0,	WZ_FROSTNOVA,Frost Nova
+88,0,6,4,1,0x2,3,10,1,yes,0,0x2000,0,magic,0,0x0,	WZ_FROSTNOVA,Frost Nova
 89,9,6,2,1,0,0,10,1,yes,0,0x2000,0,magic,2,0x0,		WZ_STORMGUST,Storm Gust
 90,9,8,1,2,0,0,5,1:2:3:4:5,yes,0,0x2000,0,magic,0,0x0,	WZ_EARTHSPIKE,Earth Spike
 91,9,8,2,2,0,0,5,1:2:3:4:5,yes,0,0x2000,0,magic,0,0x10000,	WZ_HEAVENDRIVE,Heaven's Drive

src/map/skill.c

@@ -16810,6 +16810,9 @@ int skill_attack_area(struct block_list *bl, va_list ap)
 
 	switch (skill_id) {
 		case WZ_FROSTNOVA: //Skills that don't require the animation to be removed
+			if (src->x == bl->x && src->y == bl->y)
+				return 0; //Does not hit current cell
+			//Fall through
 		case NPC_ACIDBREATH:
 		case NPC_DARKNESSBREATH:
 		case NPC_FIREBREATH: