Correction of torpedo damage power in SH4

[Gorshkov]

@Tater: As for damaged warships in my data you have: all (sunken and damaged) battleships examples and also all CV/CVE losses examples (no "damaged" CV/CVE is listed in Uboat.net data). Thus you can make simple calculations and stop telling us about "critical damage data" all the time.

@Keltros: Indeed Japan torps were very good due to one smart technial move i.e. using pure oxygen instead of atmospheric air as oxidizer. This gave them fast speed and long range. However we must think if these parameters have any practical significance in real battle. Simply firing unguided fish at 12-40 km does not guarantee any hit! Unfortunately Japanese torps did not have any FAT/LUT guidance kit installed. Therefore I suppose that Germans had the best torpedo doctrine and proper way of their technical developpment: electric propulsion (wake-less move) and more and more advanced guidance: LUF/FAT kit or self-homing (passive sonar). The later history itself ancknowlegded they were right!