Disabled bc++ warnings: variable assigned value that is never used.

src/sbbs3/GNUmakefile

@@ -18,7 +18,7 @@ DEBUG	=	1		# Comment out for release (non-debug) version
 ifdef bcc
 CC		=	bc++ -q
 LD		=	ilink -q
-CFLAGS 	=	-D__unix__ -w-csu -w-pch -w-ccc -w-rch -w-par -O2
+CFLAGS 	=	-D__unix__ -w-csu -w-pch -w-ccc -w-rch -w-par -w-aus -O2
 else
 CC		=	gcc
 LD		=	ld