R10B-10: bug in os_mon memsup.c?

[Daniel Solaz]

This is on IRIX 6.5 (unsupported by os_mon).  Using GCC 3.3.something in 
32-bit mode.

gmake[4]: Entering directory `.../otp_src_R10B-10/lib/os_mon/c_src'
gcc -c -o ../priv/obj/mips-sgi-irix6.5/memsup.o -g -O2 
-I.../otp_src_R10B-10/erts/mips-sgi-irix6.5    -DHAVE_CONFIG_H  memsup.c
memsup.c: In function `get_basic_mem':
memsup.c:230: error: `shiftleft' undeclared (first use in this function)
memsup.c:230: error: (Each undeclared identifier is reported only once
memsup.c:230: error: for each function it appears in.)
gmake[4]: *** [../priv/obj/mips-sgi-irix6.5/memsup.o] Error 1

In prior versions 'shiftleft' used to be an argument to get_basic_mem(); 
then memsup compiled and ran just fine on IRIX but returned bogus memory 
values as expected.  After the rewrite it seems it's been overlooked, 
since conditional compilation keeps this out of the way on 
os_mon-supported platforms.

BTW I'm about to finish hacking os_mon so that it works on IRIX. 
Probably nobody cares, but I'd rather contribute my patches than 
maintain an always off-line, always outdated 'Erlang on IRIX' web page.

Regards.
-Daniel