[M3commit] CVS Update: cm3

[Jay Krell]

CVSROOT:	/usr/cvs
Changes by:	jkrell at birch.	10/02/10 12:58:11

Modified files:
	cm3/m3-sys/m3back/src/: Stackx86.m3 

Log message:
	allow negating FIRST(INTEGER) even though it overflows
	allows this test case to compile:
	C:\dev2\cm3.2\m3-sys\m3tests\src\p1\p137>cm3
	--- building in NT386 ---
	
	new source -> compiling Main.m3
	"..\Main.m3", line 35: doneg: Negate overflowed
	1 error encountered
	compilation failed => not building program "pgm.exe"
	Fatal Error: package build failed
	
	tempting to make TInt.Add/Subtract return the value
	even if overflow, but for now, no.
	This fix assumes two's complement, that is,
	it assumes FIRST(INTEGER) = -FIRST(INTEGER)