[s2693] Minor Deadmines improvements

Changes:
* Some spell improvements to Mr Smite
* Improve Canon&Door event's timing

Signed-off-by: Schmoozerd <schmoozerd@scriptdev2.com>

(based on commit cd8be63)

Signed-off-by: Xfurry <xfurry@scriptdev2.com>
[s2694] Fix unused parameter warnings

(based on commit f05ec83)

Signed-off-by: Xfurry <xfurry@scriptdev2.com>