PVS-Studio warning V674 for Source SDK

void TE_BloodStream(....)
{
  ....
  int      speedCopy = amount;
  ....
  speedCopy -= 0.00001;// so last few will drip
  ....
}

This suspicious code was found in Source SDK project by PVS-Studio static code analyzer.
Warning message is:
V674 The '0.00001' literal of the 'double' type is subtracted from a variable of the 'int' type. Consider inspecting the 'speedCopy -= 0.00001' expression. Client (HL2) c_te_bloodstream.cpp 141

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