[PATCH] KJS - fix toInt32 with some negative values (#61587)

[Maks Orlovich]

Hi...

Currently, KJS mis-calculates toInt32 values for some negative numbers. For 
example, -2478659068 is converted to 0x80000000, aka MIN_INT. This is because 
the remainder for dividing this by 2^32 is negative, so we don't readjust it 
(as it's certainly < 2^31) and below MIN_INT, so casting from floating point 
to integer in ValueImp::toInt32 clamps. The attached diff appears to be the 
proper fix to me. If this is OK, is there anywhere where I can/should add a 
testcase for this?


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