PVS-Studio warning V610 for ReactOS

static INLINE int
wrap(short f, int shift)
{
  ....
  if (f < (-16 << shift))
  ....
}

This suspicious code was found in ReactOS project by PVS-Studio static code analyzer.
Warning message is:
V610 Undefined behavior. Check the shift operator '<<. The left operand '-16' is negative. vl_mpeg12_bitstream.c 653

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/