* do not cause an internal error when location_reg2string is called on a
  location where the registers have been translated (i.e. not imaginary), but
  GetNextReg is necessary to get some of the registers (only on 16/8-bit CPUs).
  The missing registers are indicated as '??'. This avoids a crash when
  compiling a system unit on i8086 with regvars enabled and withous -sr, while
  still giving the full list of registers when compiling with -sr.



git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@26276 3ad0048d-3df7-0310-abae-a5850022a9f2