part fix イタチの大暴発

[mercury233]

If one monster's ATK is above 0xFFFF(65535), MSG_SELECT_SUM won't work because opParam has the max of 0xFFFFFFFF and will be splited.

[salix5]

Maybe we should modify MSG_SELECT_SUM, PROCESSOR_SELECT_SUM.
acc should be treated as int32.

[salix5]

@mercury233
https://github.com/Fluorohydride/ygopro-core/blob/169d577bc8cfd133b54c9d829b540626245537ac/playerop.cpp#L632

pduel->write_buffer32(acc & 0xffff);

Why do we use bitwise and here?

[mercury233]

the other operation params can't get beyond 0xffff

[purerosefallen]

How about, lower the precision of attack count for 1/10.
Like, we may treat atk 1000 as value 100, and treat LP 8000 as LP 800. In this way number would be much smaller that monster with atk 655350 could fit.