* src/z80/gen.c (genFunction, genEndFunction): fixed bug 1160666,

* src/z80/gen.c (genFunction, genEndFunction): fixed bug 1160666,
  implemented patch 1120823 Thanks to Willy De la Court (normal
  interrupts need an interrupt number now if they are made critical),
  and enabled nesting of critical functions though not for gbz80
  (genCritical, genEndCritical): added functions
  (genZ80Code): added cases for CRITICAL and ENDCRITICAL
* src/z80/mappings.i: added "ei" to all mappings

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@4070 4a8a32a2-be11-0410-ad9d-d568d2c75423