Compile Warning Cleanup

* Resolves some warnings from the gcc compiler.

src/map/map.c

@@ -1233,7 +1233,6 @@ int map_foreachindir(int(*func)(struct block_list*, va_list), int16 m, int16 x0,
 	struct block_list *bl;
 	int bx, by;
 	int mx0, mx1, my0, my1, rx, ry;
-	int8 half = 0;
 	uint8 dir = map_calc_dir_xy(x0, y0, x1, y1, 6);
 	short dx = dirx[dir];
 	short dy = diry[dir];

src/map/skill.c

@@ -10739,7 +10739,6 @@ int skill_castend_nodamage_id (struct block_list *src, struct block_list *bl, ui
 static int8 skill_castend_id_check(struct block_list *src, struct block_list *target, uint16 skill_id, uint16 skill_lv) {
 	int inf = skill_get_inf(skill_id);
 	int inf2 = skill_get_inf2(skill_id);
-	struct map_session_data *sd = BL_CAST(BL_PC,  src);
 	struct status_change *tsc = status_get_sc(target);
 
 	switch (skill_id) {