* src/pic16/gen.c (pic16_freeAsmop): avoid NULL pointer dereference,

* src/pic16/gen.c (pic16_freeAsmop): avoid NULL pointer dereference,
  (genAssign): fixed for operands on the stack

* device/lib/pic16/libc/stdio/vfprintf.c,
  device/lib/pic16/configure.ac,
  device/lib/pic16/Makefile.common: add configurable support for
  printing floats via ./configure --enable-floats
* device/lib/pic16/configure,
  device/lib/pic16/Makefile.in,
  device/lib/pic16/libm/Makefile.in,
  device/lib/pic16/debug/Makefile.in,
  device/lib/pic16/libio/Makefile.in,
  device/lib/pic16/startup/Makefile.in,
  device/lib/pic16/libsdcc/Makefile.in,
  device/lib/pic16/libdev/Makefile.in,
  device/lib/pic16/libc/Makefile.in: regenerated
* doc/sdccman.lyx: documented float support and how to get it
* doc/Makefile.in: fixed race condition on parallel builds

* device/lib/pic16/libc/stdio/sprintf.c,
  device/lib/pic16/libc/stdio/vsprintf.c: do not mess up the user's
  pointer to the string buffer

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@5371 4a8a32a2-be11-0410-ad9d-d568d2c75423