* src/*/ralloc.c: removed IS_OP_RUONLY macro

* src/*/ralloc.c: removed IS_OP_RUONLY macro
* src/ds390/ralloc.c (packRegisters),
* src/mcs51/ralloc.c (packRegisters),
* src/z80/ralloc.c (packRegisters): applied fix for bug 1618050, thanks
  Robert Larice
* support/regression/tests/bug1618050.c: new, added
* support/regression/fwk/include/testfwk.h,
* support/regression/tests/bug1838000.c: moved _AUTOMEM and _STATMEM to
  testfwk.h
* src/SDCCsymt.h: fixed typo in DECLSPEC2TXT

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@5069 4a8a32a2-be11-0410-ad9d-d568d2c75423