Make interval checks more readable by showing the real upper bond.

[spixi]

In some cases the construct

cp LOWER_BOUND
jr c, .next
cp (UPPER_BOUND + 1)
jr nc, .next
ret z
.next
ld a, 1
and a
ret

is used to check if a value is in an interval. The Ghost battle check looks whether the current map is between POKEMON_TOWER_1F and POKEMON_TOWER_7F. MR_FUJIS_HOUSE is the next map after POKEMON_TOWER_7F, but it is a little confusing. To improve readability

pokered/engine/battle/core.asm

Line 3305 in d7808d1

cp MR_FUJIS_HOUSE

should say

cp (POKEMON_TOWER_7F + 1)

instead of

cp MR_FUJIS_HOUSE