PVS-Studio warning V576 for CryEngineSDK

static void GetNameForFile(
  const char* baseFileName,
  const uint32 fileIdx,
  char outputName[512] )
{
  assert(baseFileName != NULL);
  sprintf( outputName, "%s_%d", baseFileName, fileIdx );
}

This suspicious code was found in CryEngineSDK project by PVS-Studio static code analyzer.
Warning message is:
V576 Incorrect format. Consider checking the fourth actual argument of the 'sprintf' function. The SIGNED integer type argument is expected. igame.h 66

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